7r-5r2=5r+2-r

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Solution for 7r-5r2=5r+2-r equation: 



7r-5r^2=5r+2-r

We move all terms to the left:

7r-5r^2-(5r+2-r)=0

We add all the numbers together, and all the variables

-5r^2+7r-(4r+2)=0

We get rid of parentheses

-5r^2+7r-4r-2=0

We add all the numbers together, and all the variables

-5r^2+3r-2=0

a = -5; b = 3; c = -2;
Δ = b2-4ac
Δ = 32-4·(-5)·(-2)
Δ = -31
Delta is less than zero, so there is no solution for the equation

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