Question

add. simplify your answer.
$(-3x^{2} + 2xy + 5y^{2}) + (6x^{2} + 8xy - y^{2})$

Explanation:

Step1: Remove parentheses

$-3x^2 + 2xy + 5y^2 + 6x^2 + 8xy - y^2$

Step2: Group like terms

$(-3x^2 + 6x^2) + (2xy + 8xy) + (5y^2 - y^2)$

Step3: Combine like terms

$3x^2 + 10xy + 4y^2$

Answer:

$3x^2 + 10xy + 4y^2$