Question

simplify.
$(6y^{2}-9y + 3)-(4y^{2}-2y - 9)+(-5y^{2}+6y + 5)$

Explanation:

Step1: Remove parentheses

$6y^2 - 9y + 3 - 4y^2 + 2y + 9 - 5y^2 + 6y + 5$

Step2: Group like terms

$(6y^2 - 4y^2 - 5y^2) + (-9y + 2y + 6y) + (3 + 9 + 5)$

Step3: Combine like terms

$-3y^2 - y + 17$

Answer:

$-3y^2 - y + 17$