Question

Determine whether x = -2 is a root of x3 - 3x + 2 = 0

Answer 1

can you just plug it in and a see if it's true.

Answer 2

Plug and chug, baby!

Answer 3

(oh, and also understand the concept of the root of a polynomial: a root is whatever makes a polynomial equal zero)

Answer 4

Thank you!!

Answer 5

yeah so when you plug is x=-2

you have to end up with zero on the left side after you simplify.

Answer 6

i get it.