Answer:
13y
2
−14y+3
Step-by-step explanation:
Remove parentheses.
6{y}^{2}-9y+4+7{y}^{2}-5y-16y
2
−9y+4+7y
2
−5y−1
2 Collect like terms.
(6{y}^{2}+7{y}^{2})+(-9y-5y)+(4-1)(6y
2
+7y
2
)+(−9y−5y)+(4−1)
3 Simplify.
13{y}^{2}-14y+313y
2
−14y+3