x^2-170x+7000=0

Solution for x^2-170x+7000=0 equation:

x^2-170x+7000=0

a = 1; b = -170; c = +7000;
Δ = b2-4ac
Δ = -1702-4·1·7000
Δ = 900
The delta value is higher than zero, so the equation has two solutions
We use following formulas to calculate our solutions:
$x_{1}=\frac{-b-\sqrt{\Delta}}{2a}$
$x_{2}=\frac{-b+\sqrt{\Delta}}{2a}$

$\sqrt{\Delta}=\sqrt{900}=30$
$x_{1}=\frac{-b-\sqrt{\Delta}}{2a}=\frac{-(-170)-30}{2*1}=\frac{140}{2}
=70
$
$x_{2}=\frac{-b+\sqrt{\Delta}}{2a}=\frac{-(-170)+30}{2*1}=\frac{200}{2}
=100
$