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=Y2-12Y+43
We move all terms to the left:
-(Y2-12Y+43)=0
We add all the numbers together, and all the variables
-(+Y^2-12Y+43)=0
We get rid of parentheses
-Y^2+12Y-43=0
We add all the numbers together, and all the variables
-1Y^2+12Y-43=0
a = -1; b = 12; c = -43;
Δ = b2-4ac
Δ = 122-4·(-1)·(-43)
Δ = -28
Delta is less than zero, so there is no solution for the equation
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