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=Y^2+35Y+306.25
We move all terms to the left:
-(Y^2+35Y+306.25)=0
We get rid of parentheses
-Y^2-35Y-306.25=0
We add all the numbers together, and all the variables
-1Y^2-35Y-306.25=0
a = -1; b = -35; c = -306.25;
Δ = b2-4ac
Δ = -352-4·(-1)·(-306.25)
Δ = 0
Delta is equal to zero, so there is only one solution to the equation
Stosujemy wzór:$Y=\frac{-b}{2a}=\frac{35}{-2}=-17+1/2$
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