0=x2+10x+25

Solution for 0=x2+10x+25 equation:

0=x2+10x+25

We move all terms to the left:

0-(x2+10x+25)=0

We add all the numbers together, and all the variables

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

We add all the numbers together, and all the variables

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

We get rid of parentheses

-x^2-10x-25=0

We add all the numbers together, and all the variables

-1x^2-10x-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:
$x=\frac{-b}{2a}=\frac{10}{-2}=-5$