(b+7)(b+7)=0

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Solution for (b+7)(b+7)=0 equation: 



(b+7)(b+7)=0

We multiply parentheses ..

(+b^2+7b+7b+49)=0

We get rid of parentheses

b^2+7b+7b+49=0

We add all the numbers together, and all the variables

b^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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