Question

What is the factor of 4x^2-25

Answer 1

(2x+5)(2x-5) is the answer

checking your answer:

2x times 2x is 4x^2

2x times -5 is -10x

5 times 2x is 10x

5 times -5 is -25

so to check: 4x^2-10x+10x-25

equals 4x^2-25