0=r^2-r+9

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Solution for 0=r^2-r+9 equation: 



0=r^2-r+9

We move all terms to the left:

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

We add all the numbers together, and all the variables

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

We get rid of parentheses

-r^2+r-9=0

We add all the numbers together, and all the variables

-1r^2+r-9=0

a = -1; b = 1; c = -9;
Δ = b2-4ac
Δ = 12-4·(-1)·(-9)
Δ = -35
Delta is less than zero, so there is no solution for the equation

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