Question

What polynomial has roots of -4, 2, and 5 ?

Answer 1

the one that you get when you multiply
\[(x+4)(x-2)(x-5)\]

Answer 2

\[x^3-3x^2-18x-40\]

Answer 3

if 2 was a root of x^3-3x^2-18x-40, then plugging x = 2 into x^3-3x^2-18x-40 should give you 0

if it does, then x = 2 is an actual root

if it doesn't, then x = 2 is not an actual root