Answer:
10y2 -7y -3
Step-by-step explanation:
7y2 + 3y2= 10y2
-7y
4 - 7=-3
1. 7y2 - 7y + 4
7y × 2 = 14y
14y - 7y + 4
= 7y + 4
2. -(-3y2 + 7y + 7)
-3y × 2 = -6y
-(-6y + 7y + 7)
-6y + 7y = 1y = y
= -y - 7
