#QUADRATIC EQUATIONS

35 messages · Page 1 of 1 (latest)

fringe falcon
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i got till alphabetagamma = -1.
idk wht this sigma thing is... can yall help?

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jovial galleonBOT
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fringe falcon
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ik sigma means addition but im not sure of its properties,

drowsy ether
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It's sum. Though, the way they use it here is kinda bad.

fringe falcon
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like all properties et

drowsy ether
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It's mostly just algebraic manipulation, really.

fringe falcon
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the sigma thing

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then yea u can tell me the other method.

drowsy ether
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It isn't really needed to be used here. Just expand as usual.

fringe falcon
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alphabetagamma = -2

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then sub it in alpha + beta + gamma etc

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but can you please teach me what he has tried to do

drowsy ether
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Well, we always have:
(a1 + a2 + a3 + ...)^2 = (a1^2 + a2^2 + a3^2 + ...) + 2(a1 a2 + a1 a3 + a2 a3 + ...)
So, using the (shortened) sum notation, we can write it as:
(Σ(ai))^2 = Σ(ai^2) + 2Σ(ai aj)

fringe falcon
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oh

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ok bro has cooked smth here

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alr thanks ill look into it

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but if you hav anyother method please do share.

drowsy ether
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You're welcome, good luck!

drowsy ether
fringe falcon
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you dont have to teach me whole method

fringe falcon
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notation in the sense

drowsy ether
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Notation is the way you denote or write things.
So, for example, if you want to write an exponential function, you can write it as e^x or exp(x).

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Those are two different notations, but the meaning is the same.

fringe falcon
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oh

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ohhhhhhhhhhhhhh

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ok thank u

drowsy ether
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You're welcome!

fringe falcon
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+close

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# fringe falcon +close
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