Question

Factor completely 25x2 − 9

Answer 1

If the question is 25xsquare -9
then answer will be
(5x+3)(5x-3)

Answer 2

Answer:

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

Step-by-step explanation:

Factor completely $25x^2 - 9$

To factor this we write the numbers in square form

25 = 5*5= 5^2

9 = 3*3= 3^2

$5^2x^2 - 3^2$

$(5x)^2 - 3^2$

We apply difference of squares formula

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

$(5x)^2 - 3^2$

a= 5  and b = 3

So it becomes, replace the numbers in the formula

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