9m^2+42m=-49

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Solution for 9m^2+42m=-49 equation: 



9m^2+42m=-49

We move all terms to the left:

9m^2+42m-(-49)=0

We add all the numbers together, and all the variables

9m^2+42m+49=0

a = 9; b = 42; c = +49;
Δ = b2-4ac
Δ = 422-4·9·49
Δ = 0
Delta is equal to zero, so there is only one solution to the equation

                              Stosujemy wzór:
$m=\frac{-b}{2a}=\frac{-42}{18}=-2+1/3$

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