Question

How do I factor 4x^2-25 ??

Answer 1

notice you have 2 perfect squares 4x^2 and 25

this is the difference of 2 squares and the identity is

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

Answer 2

so you need to find a and b
that is take the square roots of 4x^2 and of 25 sand insert them in the identity

Answer 3

square root of 4x^2 is 2x and of 25 is ?

Answer 4

Square root of 25 is 5

Answer 5

right so (a + b)(a - b)
becomes (2x + 5)(2x - 5)

and thats it

Answer 6

Awesome thank you :)

Answer 7

yw