Question

Factor the trinomial: x2 + 3x - 40
(x - 5)(x + 8)
(x + 5)(x - 8)
(x - 4)(x + 10)
(x + 4)(x - 10)

Answer 1

(x - 5)(x + 8)

Answer 2

(x-5)(x+8)

Answer 3

-5, +8

Answer 4

agree

Answer 5

x2+8x-5x-40
x(x+8)-5(x+8)
(x-5)(x+8)

Answer 6

x2 + 3x (-) 40 ; need to subtract

x2 (+) 3x - 40 ; larger number is a +

+8-5 = +3 <-- this one works out the best

+10-4 = +6