11=-1-c2

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Solution for 11=-1-c2 equation: 



11=-1-c2

We move all terms to the left:

11-(-1-c2)=0

We add all the numbers together, and all the variables

-(-1c^2-1)+11=0

We get rid of parentheses

1c^2+1+11=0

We add all the numbers together, and all the variables

c^2+12=0

a = 1; b = 0; c = +12;
Δ = b2-4ac
Δ = 02-4·1·12
Δ = -48
Delta is less than zero, so there is no solution for the equation

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