Question

Factor Completely: 25x2 − 9

(5x + 3)(5x − 3)

(5x − 3)(5x − 3)

(5x + 1)(5x − 9)

(5x − 1)(5x − 9)

Answer 1

@cuitiefromthesouth2

Answer 2

ax^2 + bx + c
c is negative and b is canceled out..
therefor, you know that the equation's signs are (x-b)(x+b)

Answer 3

and since c = -9
only three possible factors of this
-9 and 1
-1 and 9
-3 and 3
which one cancels each other out?

Answer 4

By process of elimination you should be able to deduct that the answer is
(5x-3)(5x+3)

Answer 5

(5x-3)(5x+3)

Answer 6

A?

Answer 7

Yep

Answer 8

Thanks.