7x2+-18x+8=0

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Solution for 7x2+-18x+8=0 equation:



7x^2+-18x+8=0
We add all the numbers together, and all the variables
7x^2-18x=0
a = 7; b = -18; c = 0;
Δ = b2-4ac
Δ = -182-4·7·0
Δ = 324
The delta value is higher than zero, so the equation has two solutions
We use following formulas to calculate our solutions:
$x_{1}=\frac{-b-\sqrt{\Delta}}{2a}$
$x_{2}=\frac{-b+\sqrt{\Delta}}{2a}$

$\sqrt{\Delta}=\sqrt{324}=18$
$x_{1}=\frac{-b-\sqrt{\Delta}}{2a}=\frac{-(-18)-18}{2*7}=\frac{0}{14} =0 $
$x_{2}=\frac{-b+\sqrt{\Delta}}{2a}=\frac{-(-18)+18}{2*7}=\frac{36}{14} =2+4/7 $

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