Question

Can someone please explain how to do this ?

Factor X^2 - 25

A. (x + 5)(x - 5)
B. (x - 5)(x - 5)
C. (x + 5)(x + 5)
D. None of the above

Answer 1

assuming you mean x^2

Answer 2

Do you know the method of FOIL?

Answer 3

If you don't, its First, Outer, Inner, & Last.

Answer 4

It's the difference of two squares, and agree with Julianassange

Answer 5

I don'r remember how to solve for it though, but yes I remember FOIL

Answer 6

assume it factors into some (x+a)(x+b), which foils out to: x^2 +(a+b)x + ab

equating like terms we see that: a+b = 0, and ab=-25