Question

Factor the trinomial:Write your answer in this form, without leaving spaces: (x-2)(x+1).
x^2-10x+9

Answer 1

write 10x as -x-9x
x^2 - x - 9x +9
take x as common factor from 1st two terms and -9 as common factor from last two.
x*(x-1) - 9*(x-1)
take (x-1) as the common factor, giving the answer,
(x-1)(x-9)