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11x-9x^2=53
We move all terms to the left:
11x-9x^2-(53)=0
a = -9; b = 11; c = -53;
Δ = b2-4ac
Δ = 112-4·(-9)·(-53)
Δ = -1787
Delta is less than zero, so there is no solution for the equation
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