Question

I don't understand why 8 is the answer for this problem?

Using this-(x - 2y)(x + 2y) = 4

A. x^2-4y^2
B. 8

(which is greater)

Answer 1

Foil it out.

Answer 2

(x - 2y)(x + 2y) = x^2-4y^2 = 4

Answer 3

4<8 therefore 8 is larger!

Answer 4

ok you get x^2+4y=4

Answer 5

not +, -

Answer 6

Is the - after the word 'Using' part of the equation?

Answer 7

and that - in front is not supposed to be there polpak..

Answer 8

is that a minus sign in the front? not that it makes any difference

Answer 9

people need to learn to properly use colons.

Answer 10

i meant x^2-4y^2

Answer 11

lol yea it doesn

Answer 12

-4 is still smaller than 8

Answer 13

no it does not have a minus infront