How do you simplify (2x^2 - 4x - 5) + (10x^2 + 3x)?

Jun 15, 2015

Remove the parentheses, gather like terms, and simplify to get $12 {x}^{2} - x - 5$.

Explanation:

We can remove the parentheses since the terms inside are already simplified.

$2 {x}^{2} - 4 x - 5 + 10 {x}^{2} + 3 x$

Gather like terms and simplify.

$2 {x}^{2} + 10 {x}^{2} - 4 x + 3 x - 5$ =

$12 {x}^{2} - x - 5$