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12x^2+31+13=-7
We move all terms to the left:
12x^2+31+13-(-7)=0
We add all the numbers together, and all the variables
12x^2+51=0
a = 12; b = 0; c = +51;
Δ = b2-4ac
Δ = 02-4·12·51
Δ = -2448
Delta is less than zero, so there is no solution for the equation
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