Question

[7.07] Choose the correct product of (5x – 3)(5x + 3).
A.25x2 + 30x + 9
B.25x2 − 9
C.25x2 + 9
D.25x2 − 30x + 9

Answer 1

To solve this, you use the FOIL method. Do you know what that is?

Answer 2

F = First
O = Outside
I = Inner
L = Last

Answer 3

So (5x - 3)(5x + 3) is (5x * 5x) + (5x * 3) + (-3 * 5x) + (-3 * 3)

Can you solve it from there? Or...?

Answer 4

Yeah, I think i've got it. Thank you (:

Answer 5

No problem!