Question

factorize x^2-9x+11x-99

Answer 1

Since the middle term is already split, the only job is to pick out common from them.

x² - 9x +11x - 99 = 0
x ( x-9) +11 (x-9) = 0
(x+11)(x-9) = 0

x= -11, 9

Hope it helps!!
Cheers!!

Answer 2

x(x-9)+11(x-9)
(x+11)(x-9)
x=-11,9