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50=-16x^2+48x
We move all terms to the left:
50-(-16x^2+48x)=0
We get rid of parentheses
16x^2-48x+50=0
a = 16; b = -48; c = +50;
Δ = b2-4ac
Δ = -482-4·16·50
Δ = -896
Delta is less than zero, so there is no solution for the equation
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