3x^2-x-1.9=0

Solution for 3x^2-x-1.9=0 equation:

3x^2-x-1.9=0

We add all the numbers together, and all the variables

3x^2-1x-1.9=0

a = 3; b = -1; c = -1.9;
Δ = b2-4ac
Δ = -12-4·3·(-1.9)
Δ = 23.8
The delta value is higher than zero, so the equation has two solutions
We use following formulas to calculate our solutions:
$x_{1}=\frac{-b-\sqrt{\Delta}}{2a}$
$x_{2}=\frac{-b+\sqrt{\Delta}}{2a}$

$x_{1}=\frac{-b-\sqrt{\Delta}}{2a}=\frac{-(-1)-\sqrt{23.8}}{2*3}=\frac{1-\sqrt{23.8}}{6}
$
$x_{2}=\frac{-b+\sqrt{\Delta}}{2a}=\frac{-(-1)+\sqrt{23.8}}{2*3}=\frac{1+\sqrt{23.8}}{6}
$