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3r^2-5=-32
We move all terms to the left:
3r^2-5-(-32)=0
We add all the numbers together, and all the variables
3r^2+27=0
a = 3; b = 0; c = +27;
Δ = b2-4ac
Δ = 02-4·3·27
Δ = -324
Delta is less than zero, so there is no solution for the equation
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