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/sci/ - Science & Math

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5562357 No.5562357 [Reply] [Original]

I don't understand the last step.

What exactly is happening there?

>> No.5562363

http://en.wikipedia.org/wiki/Distributive_property

>> No.5562401

>>5562357
ah i remember this
see that when you get those two "things"(X + 3) the same the 3xsquared and the -5 are then put in a seperate parentheses, thus if you would carry out the process of FOIL, you would get your starting equation. Youre basically simplifying the original equation.

>> No.5562411

>>5562357
do last step backwards (from 4 to 3) if dont understand 3->4

>> No.5562721

I think it is called math

>> No.5562723

>a(b)-c(b)
>(b)(a-c)

>> No.5564973

Factorisation. <span class="math">(x + 3)[/spoiler] is the common factor.

>> No.5564986

you just factored out (x + 3)

>> No.5564996

>>5562357
>hat exactly is happening there?
if you work that out, you'll get a noble prize in math

>> No.5565022

>>5564996
>noble

How noble?