Question 1038254

factorize the following:-
a. ab+b^2-a-b
b. 6x-24-xy+4y
c. 12-x-x^2
d. x^2-9x+8
<pre>{{{highlight_green(matrix(4,1, (b - 1)(a + b), (6 - y)(x - 4), (4 + x)(3 - x), (x - 8)(x - 1)))}}}