r=6(r+10)(r-10)

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Solution for r=6(r+10)(r-10) equation: 



r=6(r+10)(r-10)

We move all terms to the left:

r-(6(r+10)(r-10))=0

We use the square of the difference formula

r^2+r+100=0

a = 1; b = 1; c = +100;
Δ = b2-4ac
Δ = 12-4·1·100
Δ = -399
Delta is less than zero, so there is no solution for the equation

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