x2-x+17=7x+1

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Solution for x2-x+17=7x+1 equation: 



x2-x+17=7x+1

We move all terms to the left:

x2-x+17-(7x+1)=0

We add all the numbers together, and all the variables

x^2-1x-(7x+1)+17=0

We get rid of parentheses

x^2-1x-7x-1+17=0

We add all the numbers together, and all the variables

x^2-8x+16=0

a = 1; b = -8; c = +16;
Δ = b2-4ac
Δ = -82-4·1·16
Δ = 0
Delta is equal to zero, so there is only one solution to the equation

                              Stosujemy wzór:
$x=\frac{-b}{2a}=\frac{8}{2}=4$

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