3x^2-7.2x+3.2=0

Solution for 3x^2-7.2x+3.2=0 equation:

3x^2-7.2x+3.2=0

a = 3; b = -7.2; c = +3.2;
Δ = b2-4ac
Δ = -7.22-4·3·3.2
Δ = 13.44
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{-(-7.2)-\sqrt{13.44}}{2*3}=\frac{7.2-\sqrt{13.44}}{6}
$
$x_{2}=\frac{-b+\sqrt{\Delta}}{2a}=\frac{-(-7.2)+\sqrt{13.44}}{2*3}=\frac{7.2+\sqrt{13.44}}{6}
$