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-7x=4x^2+12
We move all terms to the left:
-7x-(4x^2+12)=0
We get rid of parentheses
-4x^2-7x-12=0
a = -4; b = -7; c = -12;
Δ = b2-4ac
Δ = -72-4·(-4)·(-12)
Δ = -143
Delta is less than zero, so there is no solution for the equation
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