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3x^2+12x=-30
We move all terms to the left:
3x^2+12x-(-30)=0
We add all the numbers together, and all the variables
3x^2+12x+30=0
a = 3; b = 12; c = +30;
Δ = b2-4ac
Δ = 122-4·3·30
Δ = -216
Delta is less than zero, so there is no solution for the equation
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