Question

How do you multiply `(- 5x ^ { 3} ) \cdot ( - 4x ^ { 9} )`?

Answer 1

`20x^12`

Explanation:

`(-5x^3)* (-4x^9) = (-5) * (-4) * (x^3) * (x^9)`
`= 20 * x^3 * x^9 = 20 x^(3+9)`
`= 20x^12`