x(16-x)=64

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Solution for x(16-x)=64 equation: 



x(16-x)=64

We move all terms to the left:

x(16-x)-(64)=0

We add all the numbers together, and all the variables

x(-1x+16)-64=0

We multiply parentheses

-1x^2+16x-64=0

a = -1; b = 16; c = -64;
Δ = b2-4ac
Δ = 162-4·(-1)·(-64)
Δ = 0
Delta is equal to zero, so there is only one solution to the equation

                              Stosujemy wzór:
$x=\frac{-b}{2a}=\frac{-16}{-2}=+8$

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