Multiply and simplify
(x-4)(x^2 - 5x - 6)

x^3 - 9x^2 +14x +24

Step-by-step explanation:

(x-4)(x^2 - 5x - 6)

First multiply x by everything in the second term

x (x^2 - 5x - 6) = x^3 -5x^2 -6x

Then multiply -4 by everything in the second term

-4 (x^2 - 5x - 6) = -4x^2 +20x +24

Then we add the results together.

I like to line them up vertically.

x^3 -5x^2 -6x

     -4x^2 +20x +24

x^3 - 9x^2 +14x +24

x = -5

step-by-step explanation: