18r^2=21r-9

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Solution for 18r^2=21r-9 equation: 



18r^2=21r-9

We move all terms to the left:

18r^2-(21r-9)=0

We get rid of parentheses

18r^2-21r+9=0

a = 18; b = -21; c = +9;
Δ = b2-4ac
Δ = -212-4·18·9
Δ = -207
Delta is less than zero, so there is no solution for the equation

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