# How do you simplify (x^2+ 3x) - (x^2+ 2x + 3)?

Mar 4, 2018

The answer is $x - 3$.

#### Explanation:

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

Remove the unnecessary brackets.
$= {x}^{2} + 3 x - \left({x}^{2} + 2 x + 3\right)$

When there is a "-" sign in front of the bracket, change the sign of term in the bracket.
$= {x}^{2} + 3 x - {x}^{2} - 2 x - 3$

Eliminate the opposites.
$= 3 x - 2 x - 3$

Collect the like terms.
$= x - 3$

Hope this helped, it might be a little confusing.