9r^2+1=-4r

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Solution for 9r^2+1=-4r equation: 



9r^2+1=-4r

We move all terms to the left:

9r^2+1-(-4r)=0

We get rid of parentheses

9r^2+4r+1=0

a = 9; b = 4; c = +1;
Δ = b2-4ac
Δ = 42-4·9·1
Δ = -20
Delta is less than zero, so there is no solution for the equation

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