Question

which expression is equivalent to 64 - 9x^2?

Answer 1

Answer:

(8-3x) (8+3x)

Step-by-step explanation:

64 - 9x^2

We can factor this expression since the is the difference of squares

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

let 64 = a^2  so a =8

let  9x^2 = b^2  so b = 3x

64 - 9x^2 = (8-3x) (8+3x)