# How do you simplify  -3a * a^2?

Apr 11, 2016

$- 3 \cdot {a}^{1 + 2} = - 3 \cdot {a}^{3}$ or just $- 3 {a}^{3}$

#### Explanation:

Since $a$ is a common base for the exponentiation, we must look it this way:

$- 3 \cdot {a}^{1} \cdot {a}^{2}$

To simplify it, just add the exponentiation from both bases(since both are "a", equal bases), like this:

$- 3 \cdot {a}^{1 + 2} = - 3 \cdot {a}^{3}$ or just $- 3 {a}^{3}$