Question

Find a cubic function with the given zeros.

-2, 5, -6

Answer 1

f(x) = x3 + 3x2 + 28x - 60

f(x) = x3 - 3x2 - 28x - 60

f(x) = x3 + 3x2 - 28x - 60

f(x) = x3 + 3x2 - 28x + 60

Answer 2

(x+2)(x-5)(x+6)
Expand that.

Answer 3

how?

Answer 4

Multiply out; or FOIL.

Answer 5

ok

Answer 6

Im stuck

Answer 7

Stuck where?

Answer 8

I dont know how to foil three sets of numbers

Answer 9

Do two first. Then do the third one.

Answer 10

so do (x+2)(x-5) and then (x-5)(x+6)

Answer 11

No. Do (x+2)(x-5).
For whatever you get; do that with (x+6)

Answer 12

ohhhhhhhhhhhhhh thats soooo easy

Answer 13

Let me see what you do.

Answer 14

\[(x+2)\text{ }(x-5 )( x+6)=\left(x^2-3 x-10\right)( x+6) \]

Answer 15

thats what I just got

Answer 16

Go on from there. Just do the two as you would.