7n^2-2n=-9

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Solution for 7n^2-2n=-9 equation: 



7n^2-2n=-9

We move all terms to the left:

7n^2-2n-(-9)=0

We add all the numbers together, and all the variables

7n^2-2n+9=0

a = 7; b = -2; c = +9;
Δ = b2-4ac
Δ = -22-4·7·9
Δ = -248
Delta is less than zero, so there is no solution for the equation

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