7r2-3r-5=-9

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Solution for 7r2-3r-5=-9 equation: 



7r^2-3r-5=-9

We move all terms to the left:

7r^2-3r-5-(-9)=0

We add all the numbers together, and all the variables

7r^2-3r+4=0

a = 7; b = -3; c = +4;
Δ = b2-4ac
Δ = -32-4·7·4
Δ = -103
Delta is less than zero, so there is no solution for the equation

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