17=-x^2+8x

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Solution for 17=-x^2+8x equation: 



17=-x^2+8x

We move all terms to the left:

17-(-x^2+8x)=0

We get rid of parentheses

x^2-8x+17=0

a = 1; b = -8; c = +17;
Δ = b2-4ac
Δ = -82-4·1·17
Δ = -4
Delta is less than zero, so there is no solution for the equation

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