• Find y
-y^2 +8y -15
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Answer:
y = 5,3
Step-by-step explanation:
- -y²+8y-15
- by changing signs
- y²-8y+15=0
- y²-5y-3y+15=0
- y(y-5)-3(y-5)=0
- (y-5)(y-3)=0
- (y-5)=0 (y-3) = 0
- y = 5 y = 3
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