Question

What polynomial has roots of –1, –2, and 3 ?
a)x3 – x2 – 5x + 2
b)x3 – 7x – 6
c)x3 + 6x2 + 11x + 6
d)x3 + 2x2 – 7x + 2

Answer 1

(x+1)(x+2)(x-3)
exand this

Answer 2

Exand?

Answer 3

expand*

Answer 4

Answer is b

Answer 5

you could just plug into each polynomial and see if you get 0 for each root

Answer 6

or do factoring like they suggest

Answer 7

well multiply the factors