Question

Simplify (5x+10)(5x-10)

Answer 1

FOIL

Answer 2

so...answer would be 5(x^2-4)?

Answer 3

factor out a 5
5(x+2)(x-2)

Answer 4

This is simple, you can solve by using the identity:
(a + b) (a-b) = a^2 - b^2

so it is (5x)^2 - (10)^2 = 25x^2 - 100

Answer 5

ooops yeah i meant 25(x-2)(x+2)

Answer 6

which reduces to 5(x^2-4)?

Answer 7

Then you can take out common factor 25 to get final answer
25 (x^2 - 4)

Answer 8

@kaynkay
Go thru my answer.
It is step-by-step logic and clear

Answer 9

oops - I see, have to leave the 25, since the 100 is the factor - so answer would be:
25(x^2-4)...got it, thank you!

Answer 10

Good !

However, if you hv to show factors, then dumbcow's answer is right.