help with factor idk what I did wrong

[wide relic]

which task?

d.)?

@fiery carbon

[fiery carbon]

Yes

@wide relic

[wide relic]

1 sec

[glossy granite]

that says -3 not -30

[fiery carbon]

But you need to do a times c

My teacher says

[glossy granite]

what?

[fiery carbon]

What times up to 30 and what adds up to 13

[glossy granite]

how did we get 30?

[fiery carbon]

10 times -3 is -30

[glossy granite]

noo who told you that

[wide relic]

i got answer

do you need to know?

[fiery carbon]

My teacher does that though lol

[fiery carbon]

I need the steps

[wide relic]

oh

ok

[fiery carbon]

Answer Is on the book

And ai is not answering the thing properly

[jolly dome]

why did u put 3x-4 + 15? shouldnt it be (3x - 4)(3x -4)?

[wide relic]

i think you should open the brackets first

opening brackets will be longer but it might be easier to understand

[fiery carbon]

Because 15 times-2 = 30

So you put that with the a value

[wide relic]

@fiery carbon is answer (6x-5)(15x-21)?

[fiery carbon]

Yep

[wide relic]

ok

[fiery carbon]

Wait

3(5x-7)(6x-5)

[wide relic]

yews its the same

[fiery carbon]

Yeah

[wide relic]

Just try to open the brackets first

and then sum all up

[fiery carbon]

Idk

That don't work

[wide relic]

then find bothx values

with quadratic formula

[fiery carbon]

Not supposed to do that

That

[wide relic]

oh

[glossy granite]

you first set 3x-4=u then you have to factor 10u^2+13u-3 or 10u^2+13u-13+10... and then you substitue u back so it become 3(5x-7)(6x-5)

[glossy granite]

no please dont do that

[wide relic]

its not that long 😅

[glossy granite]

you really dont need to

[glossy granite]

this is the way to do it

[fiery carbon]

Thanks

[glossy granite]

did you get it or should i explain more?

[fiery carbon]

Nah its fine

[glossy granite]

alr

[wide relic]

@glossy granite but you still have to find u value with D

dont you?

[glossy granite]

D?

whats D

[wide relic]

discriminant

[glossy granite]

i mean no?

[wide relic]

then how you factor 10u2+13u-3

[glossy granite]

like i showed,

[jolly dome]

i still dont get why you arent just expanding 3x-4 why are u doing it the hard way

[glossy granite]

1 sec

[jolly dome]

like 10(3x-4)(3x-4) + 13(3x-4)-3

[glossy granite]

i mean you can

whats the result

but thats not the easy way

@wide relic did you get it?

[wide relic]

1 sec

oh ye

[glossy granite]

10u^2+13u-3= ...so the result is 3(5x-7)(6x-5)

[wide relic]

well its a nice idea but idk how did you imagine to subtract 13 and get the result

i could not see i could use this trick

[glossy granite]

well if you dont, just do it the way it works for you

i am just saying mine

[wide relic]

i know i just want to learn your ways

xD

[glossy granite]

lol

[jolly dome]

if u expand it u can just factor and then group them by using decomposition

[glossy granite]

you can yeah

[jolly dome]

is there an easier way

?

[wide relic]

yes

he showed already

[wide relic]

.

[glossy granite]

well easier, it depends

[glossy granite]

opening it up and then finding solutions etc is always the easiest way, just not the quickest

[wide relic]

so what is the anser?

answer?

[glossy granite]

3(5x-7)(6x-5)

[wide relic]

ok i got the same

thx

[glossy granite]

np

[wide relic]

bye