0=x^2+17x+72.25

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Solution for 0=x^2+17x+72.25 equation: 



0=x^2+17x+72.25

We move all terms to the left:

0-(x^2+17x+72.25)=0

We add all the numbers together, and all the variables

-(x^2+17x+72.25)=0

We get rid of parentheses

-x^2-17x-72.25=0

We add all the numbers together, and all the variables

-1x^2-17x-72.25=0

a = -1; b = -17; c = -72.25;
Δ = b2-4ac
Δ = -172-4·(-1)·(-72.25)
Δ = 0
Delta is equal to zero, so there is only one solution to the equation

                              Stosujemy wzór:
$x=\frac{-b}{2a}=\frac{17}{-2}=-8+1/2$

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