G(-5)=x^2+2x

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Solution for G(-5)=x^2+2x equation: 



(-5)=G^2+2G

We move all terms to the left:

(-5)-(G^2+2G)=0

We add all the numbers together, and all the variables

-(G^2+2G)-5=0

We get rid of parentheses

-G^2-2G-5=0

We add all the numbers together, and all the variables

-1G^2-2G-5=0

a = -1; b = -2; c = -5;
Δ = b2-4ac
Δ = -22-4·(-1)·(-5)
Δ = -16
Delta is less than zero, so there is no solution for the equation

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