-х^2+х-12=? Х^2-14х+45=? (Х-1)(х+4)-24=?

Question

-х^2+х-12=?
Х^2-14х+45=?
(Х-1)(х+4)-24=?

Answer 1

2) x^2-5x-9x+45
x(x-5)-9(x-5)
(x-5)(x-9)

3) x^2+4x-x-4--24
x^2+3x-28
x^2+7x-4x-28
x*(x+7)-4(x+7)
(x+7)(x-4)