Question

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

Answer 1

when you have a polynomial with roots a, b, c you can just do:
(x-a)(x-b)(x-c) = 0

Answer 2

To get the answer.

Answer 3

Is it x^3-x^2-22x+40

Answer 4

This is my answer:
\(x=-4; x=-2; x=5\)
\((x+4)(x+2)(x-5)\)
\((x^2+2x+4x+8)(x-5)\)
\((x^2+6x+8)(x-5)\)
\(x^3+6x^2+8x-5x^2-30x-40\)
\(x^3+x^2-22x-40\)
Remember that \(x=4\) comes from \(x-4=0\).