Question

resolve the factor -4(a-3b)+8(a-3b)^2

Answer 1

-4(a-3b)+8(a-3b)²
let (a-3b) = x

-4x + 8x²
-4x ( 1 - 2x )

substitute the value of x = (a-3b)

-4(a-3b) [1-2(a-3b)]
= (-4a + 12b )(1-2a+6b)

hope this helps you