-7x^2+4x=9

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Solution for -7x^2+4x=9 equation: 



-7x^2+4x=9

We move all terms to the left:

-7x^2+4x-(9)=0

a = -7; b = 4; c = -9;
Δ = b2-4ac
Δ = 42-4·(-7)·(-9)
Δ = -236
Delta is less than zero, so there is no solution for the equation

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