-81r^2=100

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Solution for -81r^2=100 equation: 



-81r^2=100

We move all terms to the left:

-81r^2-(100)=0

a = -81; b = 0; c = -100;
Δ = b2-4ac
Δ = 02-4·(-81)·(-100)
Δ = -32400
Delta is less than zero, so there is no solution for the equation

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