7x^2-210X=0

Solution for 7x^2-210X=0 equation:

7x^2-210x=0

a = 7; b = -210; c = 0;
Δ = b2-4ac
Δ = -2102-4·7·0
Δ = 44100
The delta value is higher than zero, so the equation has two solutions
We use following formulas to calculate our solutions:
$x_{1}=\frac{-b-\sqrt{\Delta}}{2a}$
$x_{2}=\frac{-b+\sqrt{\Delta}}{2a}$

$\sqrt{\Delta}=\sqrt{44100}=210$
$x_{1}=\frac{-b-\sqrt{\Delta}}{2a}=\frac{-(-210)-210}{2*7}=\frac{0}{14}
=0
$
$x_{2}=\frac{-b+\sqrt{\Delta}}{2a}=\frac{-(-210)+210}{2*7}=\frac{420}{14}
=30
$