Question

Factor x^2 + 10x - 18

a) (x - 2)(x - 9)
b) (x + 3)(x - 6)
c) (x -2)(x + 5)
d) prime

Answer 1

d) Try to factor, or expand the answers. None work.

Answer 2

When factoring, you want to think of 2 numbers that multiply to -18, and add to 10.

Answer 3

none

Answer 4

remember FOIL

FIRST OUTSIDE INSIDE LAST

a) x^2-9x-2x+11
b) x^2-6x+3x-3
c) x^2+5x-2x+3