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5r^2+5=r
We move all terms to the left:
5r^2+5-(r)=0
We add all the numbers together, and all the variables
5r^2-1r+5=0
a = 5; b = -1; c = +5;
Δ = b2-4ac
Δ = -12-4·5·5
Δ = -99
Delta is less than zero, so there is no solution for the equation
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