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3r^2=9r-8
We move all terms to the left:
3r^2-(9r-8)=0
We get rid of parentheses
3r^2-9r+8=0
a = 3; b = -9; c = +8;
Δ = b2-4ac
Δ = -92-4·3·8
Δ = -15
Delta is less than zero, so there is no solution for the equation
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