# How do you find the sum or difference of (6x^3-4)+(-2x^3+9)?

May 28, 2018

See a solution process below:

#### Explanation:

First, remove all of the terms from parenthesis. Be careful to handle the signs of each individual term correctly:

$6 {x}^{3} - 4 - 2 {x}^{3} + 9$

Next, group like terms:

$6 {x}^{3} - 2 {x}^{3} - 4 + 9$

Now, combine like terms:

$\left(6 - 2\right) {x}^{3} + \left(- 4 + 9\right)$

$4 {x}^{3} + 5$