#Pascal triangle and the expanding the binomial using it

122 messages · Page 1 of 1 (latest)

coarse lodge
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I need someone to explain it to me

grim mulchBOT
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coarse lodge
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Make any question, I need to clarify it in my head

azure ridge
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their relationship, or an actual expansion problem?

coarse lodge
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actual expansion problem

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for example

azure ridge
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perfect

coarse lodge
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(4x+6y)^4

azure ridge
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yes

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finding a specific term or expanding?

coarse lodge
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expanding

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just getting the answer

azure ridge
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if expanding we can represent it as $\sum_{k=0}^{4} \binom{4}{k}(4x)^k\cdot (6y)^{4-k}$

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so calculate each term and add them together

coarse lodge
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HUH

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WOAH

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WAIT

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i mean dis kinda expanding

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gah leee

azure ridge
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no don’t do that 😅

coarse lodge
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What do you mean

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My teacher taught that

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he basically

halcyon dirgeBOT
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;( | 追放された興奮

coarse lodge
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like, let me explain what he taught me

azure ridge
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okay

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go ahead

coarse lodge
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this is what i was taught

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and what i learnt from, in videos

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its this kinda problem

coarse lodge
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yk

azure ridge
coarse lodge
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Are you sure?

azure ridge
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yes.

coarse lodge
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Sure, ill go with it

azure ridge
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all you do is calculate each term

coarse lodge
azure ridge
azure ridge
coarse lodge
coarse lodge
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bro idk, im hella confused with this example, can you work it out and ill see if i understand?

azure ridge
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so we have (6y)^4+4(4x)(6y)^3+6(4x)^2(6y)^2+4(4x)^3(6y)+(4x)^4

coarse lodge
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okay okay

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why did you start with

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y first though?

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i thought it was x

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x, xy, xy, xy, y

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or am i buggin

azure ridge
coarse lodge
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Sure I guess, Okay continue

azure ridge
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i just did it according to the sum notation

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anyways, do you understand?

coarse lodge
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mhm

azure ridge
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alright, try one on your own

coarse lodge
azure ridge
coarse lodge
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ah, I see

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this is CONFUSING DAMN

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I understand it, my problem is

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I dont know, where to

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multiply first

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and in what order to go through

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like

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4(4x)(6y)^3

azure ridge
coarse lodge
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where do my multiply first

azure ridge
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oh like that

coarse lodge
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I know order doesnt matter

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im saying, so i can

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have a tiny rule to make it simpler

azure ridge
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well we know 6^3=216 right

coarse lodge
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okay

azure ridge
coarse lodge
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when i do math i always try to find something to simplify things more

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u js told me

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6 powered by 3 is 216

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now ill know, to start from there

azure ridge
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yeah

coarse lodge
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then move onto the others

azure ridge
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i guess so?

coarse lodge
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as a rule

azure ridge
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this doesn’t really have an “order”

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or “rule”

coarse lodge
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I know, but u can always simplify it

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ykwim

azure ridge
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yes

coarse lodge
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alright so

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like

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4(4x)(6y)^3

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where do i start from

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and where do i end at

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u said

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6^3

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technically im starting from the right

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so, continue

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its 216

azure ridge
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now 216x4x4

coarse lodge
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so u start from

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right to left

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6^3

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then u move onto the 4's

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and u times it with what u had

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and u got ur answer

azure ridge
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or just use calculator if you are allowed

coarse lodge
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okay

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3456

azure ridge
halcyon dirgeBOT
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Result:

3456
azure ridge
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yep

coarse lodge
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brb

broken schoonerBOT
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@coarse lodge

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keen mortar
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+cloee

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+close