-49=b2-14b

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Solution for -49=b2-14b equation: 



-49=b2-14b

We move all terms to the left:

-49-(b2-14b)=0

We add all the numbers together, and all the variables

-(+b^2-14b)-49=0

We get rid of parentheses

-b^2+14b-49=0

We add all the numbers together, and all the variables

-1b^2+14b-49=0

a = -1; b = 14; c = -49;
Δ = b2-4ac
Δ = 142-4·(-1)·(-49)
Δ = 0
Delta is equal to zero, so there is only one solution to the equation

                              Stosujemy wzór:
$b=\frac{-b}{2a}=\frac{-14}{-2}=+7$

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