Question

How would the expression x^2-4 be rewritten using Difference of Squares?

A) (x+2)^2
B) (x-4)^2
C) (x+4)(x-4)
D) (x+2)(x-2)

Answer 1

d.........................

Answer 2

Hello there!

The answer is D) (x+2)(x-2)

To remember how to factor a difference of perfect squares, the terms, for lack of better words, are divided in half.
Example:
x²: (x+ )(x- )
4: ( +2)( -2)
Do you see what each term "does" to the answer?
(x+2)(x-2)

I really hope this helps!
Best wishes :)