Question

Double check my work? Is the answer to (x + 6)(x − 6) and (x − 6)(x − 6) = x^2 - 36 and x^2 + 36?

Answer 1

Yes you're correct :)

Answer 2

The first one is right, the second should be x^2 -12x +36

Answer 3

no wait, on the 2nd one it's x^2-12x+36, first one is right.

Answer 4

Oh, what makes it that way? If you don't mind explaining (:

Answer 5

(x - 6)(x - 6)
use the distributive law

first multiply the contents of second parentheses by x, then by -6:
= x*x + x*(-6) - 6(x) -6(-6)
= x^2 -6x - 6x + 36
the 2 middle terms simplify:
= x^2 - 12x + 36

Answer 6

if you do same thing with (x + 6)(x - 6)

the 2 middle terms are -6x + 6x which = 0 so they disappear
last term -s -6 * 6 = -36

giving x^2 - 36

Answer 7

thank you all!

Answer 8

yw