Question

Simplify the following expression:
-5[(x^3 + 1)(x + 4)]​

Answer 1

`-5x^(4) -20x^(3) -5x-20`

Explanation:

`-5[(x^(3) +1)(x+4)]`

Use the FOIL method for the last two groups.

`-5(x^(4) +4x^(3) +x+4)`

Now, distribute the -5 into each term.

`-5x^(4) -20x^(3) -5x-20`