-v^2=25-10v

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Solution for -v^2=25-10v equation: 



-v^2=25-10v

We move all terms to the left:

-v^2-(25-10v)=0

We add all the numbers together, and all the variables

-v^2-(-10v+25)=0

We add all the numbers together, and all the variables

-1v^2-(-10v+25)=0

We get rid of parentheses

-1v^2+10v-25=0

a = -1; b = 10; c = -25;
Δ = b2-4ac
Δ = 102-4·(-1)·(-25)
Δ = 0
Delta is equal to zero, so there is only one solution to the equation

                              Stosujemy wzór:
$v=\frac{-b}{2a}=\frac{-10}{-2}=+5$

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