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2x^2=4x-12
We move all terms to the left:
2x^2-(4x-12)=0
We get rid of parentheses
2x^2-4x+12=0
a = 2; b = -4; c = +12;
Δ = b2-4ac
Δ = -42-4·2·12
Δ = -80
Delta is less than zero, so there is no solution for the equation
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