-9r^2=81

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Solution for -9r^2=81 equation: 



-9r^2=81

We move all terms to the left:

-9r^2-(81)=0

a = -9; b = 0; c = -81;
Δ = b2-4ac
Δ = 02-4·(-9)·(-81)
Δ = -2916
Delta is less than zero, so there is no solution for the equation

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