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2x(-4x)=12
We move all terms to the left:
2x(-4x)-(12)=0
We multiply parentheses
-8x^2-12=0
a = -8; b = 0; c = -12;
Δ = b2-4ac
Δ = 02-4·(-8)·(-12)
Δ = -384
Delta is less than zero, so there is no solution for the equation
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