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=-2(Y+4)2+5
We move all terms to the left:
-(-2(Y+4)2+5)=0
We calculate terms in parentheses: -(-2(Y+4)2+5), so:We get rid of parentheses
-2(Y+4)2+5
We multiply parentheses
-4Y-16+5
We add all the numbers together, and all the variables
-4Y-11
Back to the equation:
-(-4Y-11)
4Y+11=0
We move all terms containing Y to the left, all other terms to the right
4Y=-11
Y=-11/4
Y=-2+3/4
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