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5x^2+1=4x-7
We move all terms to the left:
5x^2+1-(4x-7)=0
We get rid of parentheses
5x^2-4x+7+1=0
We add all the numbers together, and all the variables
5x^2-4x+8=0
a = 5; b = -4; c = +8;
Δ = b2-4ac
Δ = -42-4·5·8
Δ = -144
Delta is less than zero, so there is no solution for the equation
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