Question

factor 169x2 - 16y2

Answer 1

difference of 2 squares
a^2 - b^2 = (a + b)(a - b)

Answer 2

here
a^2 = 169x^2 and b^2 = 16y^2

Answer 3

now you can find a and b
a = square root of 169x^2
b = square root of 16y^2

can u work these out?