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5x-4=2x^2+7x
We move all terms to the left:
5x-4-(2x^2+7x)=0
We get rid of parentheses
-2x^2+5x-7x-4=0
We add all the numbers together, and all the variables
-2x^2-2x-4=0
a = -2; b = -2; c = -4;
Δ = b2-4ac
Δ = -22-4·(-2)·(-4)
Δ = -28
Delta is less than zero, so there is no solution for the equation
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