Question

Factor x^2-9

Answer 1

difference of squares
Recall :

a^2-b^2=(a+b)(a-b)

Answer 2

okay thank you

Answer 3

in your case, a=x and b=3

Answer 4

okay so i still don't get it

Answer 5

If you have x^2-9

then we can write it as (x)^2-(3)^2

so using that formula a^2-b^2=(a+b)(a-b),

we get(x+3)(x-3)

Answer 6

ooohhhhh thanks sir