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X=6X^2+15
We move all terms to the left:
X-(6X^2+15)=0
We get rid of parentheses
-6X^2+X-15=0
a = -6; b = 1; c = -15;
Δ = b2-4ac
Δ = 12-4·(-6)·(-15)
Δ = -359
Delta is less than zero, so there is no solution for the equation
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