7n^2-56n=-112

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Solution for 7n^2-56n=-112 equation: 



7n^2-56n=-112

We move all terms to the left:

7n^2-56n-(-112)=0

We add all the numbers together, and all the variables

7n^2-56n+112=0

a = 7; b = -56; c = +112;
Δ = b2-4ac
Δ = -562-4·7·112
Δ = 0
Delta is equal to zero, so there is only one solution to the equation

                              Stosujemy wzór:
$n=\frac{-b}{2a}=\frac{56}{14}=4$

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