Hello from MrBillDoesMath!
Answer:
9x (4x+1)
Discussion:
4(3x+1)^2 - 5(3x+1) + 1
Let u = 3x + 1, then the equation becomes the quadratic:
4u^2 - 5u +1 = (4u-1) (u-1)
Replacing "u" by its x expression gives
(4 ( 3x+1) -1) ( (3x+1) -1 ) =
(12x + 4 -1 ) (3x) =
3x (12x + 3) =
Factor 3 from each term in the parentheses to get
(3x * 3) (4x + 1) =
9x (4x+1)
Thank you,
MrB
