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15x^2+x=-6
We move all terms to the left:
15x^2+x-(-6)=0
We add all the numbers together, and all the variables
15x^2+x+6=0
a = 15; b = 1; c = +6;
Δ = b2-4ac
Δ = 12-4·15·6
Δ = -359
Delta is less than zero, so there is no solution for the equation
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