x(200-x)=10000

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Solution for x(200-x)=10000 equation: 



x(200-x)=10000

We move all terms to the left:

x(200-x)-(10000)=0

We add all the numbers together, and all the variables

x(-1x+200)-10000=0

We multiply parentheses

-1x^2+200x-10000=0

a = -1; b = 200; c = -10000;
Δ = b2-4ac
Δ = 2002-4·(-1)·(-10000)
Δ = 0
Delta is equal to zero, so there is only one solution to the equation

                              Stosujemy wzór:
$x=\frac{-b}{2a}=\frac{-200}{-2}=+100$

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