Question

Factor the following polynomial: x2 – 3x – 40

Answer 1

8 and 5.

Answer 2

how did you get that?

Answer 3

(x – 8)(x + 5)

Answer 4

\[x^2-3x-40\]
c = 8 * 5, 10 * 4, 20 * 2, 40 * 1

What +/- combination obtains b = - 3?

+/- 8 +/5 works.

-8 +5 = -3

(x - 8) (x + 5)

Answer 5

thank you!

Answer 6

Check (x-8)(x+5)

x(x+5)-8(x+5)

xx + 5x -8x- 40

xx -3x -40

x^2 - 3x - 40