9-7a=-a^2-11

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Solution for 9-7a=-a^2-11 equation: 



9-7a=-a^2-11

We move all terms to the left:

9-7a-(-a^2-11)=0

We get rid of parentheses

a^2-7a+11+9=0

We add all the numbers together, and all the variables

a^2-7a+20=0

a = 1; b = -7; c = +20;
Δ = b2-4ac
Δ = -72-4·1·20
Δ = -31
Delta is less than zero, so there is no solution for the equation

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