-9x^2+21x=9x+9

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Solution for -9x^2+21x=9x+9 equation: 



-9x^2+21x=9x+9

We move all terms to the left:

-9x^2+21x-(9x+9)=0

We get rid of parentheses

-9x^2+21x-9x-9=0

We add all the numbers together, and all the variables

-9x^2+12x-9=0

a = -9; b = 12; c = -9;
Δ = b2-4ac
Δ = 122-4·(-9)·(-9)
Δ = -180
Delta is less than zero, so there is no solution for the equation

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