G(-2)=x2-2x

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Solution for G(-2)=x2-2x equation: 



(-2)=G2-2G

We move all terms to the left:

(-2)-(G2-2G)=0

We add all the numbers together, and all the variables

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

We add all the numbers together, and all the variables

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

We get rid of parentheses

-G^2+2G-2=0

We add all the numbers together, and all the variables

-1G^2+2G-2=0

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

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