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10r^2-9=-145
We move all terms to the left:
10r^2-9-(-145)=0
We add all the numbers together, and all the variables
10r^2+136=0
a = 10; b = 0; c = +136;
Δ = b2-4ac
Δ = 02-4·10·136
Δ = -5440
Delta is less than zero, so there is no solution for the equation
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