-m^2+6m+9=-2m^2

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Solution for -m^2+6m+9=-2m^2 equation: 



-m^2+6m+9=-2m^2

We move all terms to the left:

-m^2+6m+9-(-2m^2)=0

We add all the numbers together, and all the variables

-1m^2-(-2m^2)+6m+9=0

We get rid of parentheses

-1m^2+2m^2+6m+9=0

We add all the numbers together, and all the variables

m^2+6m+9=0

a = 1; b = 6; c = +9;
Δ = b2-4ac
Δ = 62-4·1·9
Δ = 0
Delta is equal to zero, so there is only one solution to the equation

                              Stosujemy wzór:
$m=\frac{-b}{2a}=\frac{-6}{2}=-3$

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