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9+3x^2=-6
We move all terms to the left:
9+3x^2-(-6)=0
We add all the numbers together, and all the variables
3x^2+15=0
a = 3; b = 0; c = +15;
Δ = b2-4ac
Δ = 02-4·3·15
Δ = -180
Delta is less than zero, so there is no solution for the equation
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