Question

Factor the expression. 9b^2 – 25

Answer 1

this is a difference of squares, so your answer will be (a - b)(a + b), where a is the square root of 9b^2, and b is the square root of 25

Answer 2

@AriPotta i dont get wht a will be

Answer 3

what's the square root of 9b^2?

Answer 4

@AriPotta idk

Answer 5

what's the square root of 9

Answer 6

3

Answer 7

and what's the square root of b^2

Answer 8

b?

Answer 9

yes. so 3b is a

Answer 10

then how do i get the answer

Answer 11

what's the square root of 25

Answer 12

5

Answer 13

so a = 3b, b = 5

input those values into (a - b)(a + b) and that's your answer

Answer 14

(3b-5)(3b+5)