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=-3Y^2+30Y-78
We move all terms to the left:
-(-3Y^2+30Y-78)=0
We get rid of parentheses
3Y^2-30Y+78=0
a = 3; b = -30; c = +78;
Δ = b2-4ac
Δ = -302-4·3·78
Δ = -36
Delta is less than zero, so there is no solution for the equation
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