Question

how do i factor 16a^2 - 4b^2

Answer 1

note that each term is a perfect square
this is the difference of 2 squares so use the identity

x^2 - y^2 = (x + y)(x - y)

here x = 4a and can u say what y = ?

Answer 2

4(2a+b)(2a-b)?

Answer 3

16a^2 - 4b^2
yes - you can simplify first by taking out 4:
= 4 (4a^2 + b^2)
= 4(2a + b)(2a - b)

Answer 4

thank you

Answer 5

yw