1.4x^2-31x=0

Solution for 1.4x^2-31x=0 equation:

1.4x^2-31x=0

a = 1.4; b = -31; c = 0;
Δ = b2-4ac
Δ = -312-4·1.4·0
Δ = 961
The delta value is higher than zero, so the equation has two solutions
We use following formulas to calculate our solutions:
$x_{1}=\frac{-b-\sqrt{\Delta}}{2a}$
$x_{2}=\frac{-b+\sqrt{\Delta}}{2a}$

$\sqrt{\Delta}=\sqrt{961}=31$
$x_{1}=\frac{-b-\sqrt{\Delta}}{2a}=\frac{-(-31)-31}{2*1.4}=\frac{0}{2.8}
=0
$
$x_{2}=\frac{-b+\sqrt{\Delta}}{2a}=\frac{-(-31)+31}{2*1.4}=\frac{62}{2.8}
=22+0.4/2.8
$