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3x^2=9x-30=0
We move all terms to the left:
3x^2-(9x-30)=0
We get rid of parentheses
3x^2-9x+30=0
a = 3; b = -9; c = +30;
Δ = b2-4ac
Δ = -92-4·3·30
Δ = -279
Delta is less than zero, so there is no solution for the equation
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