3x^2-38x-72=0

Solution for 3x^2-38x-72=0 equation:

3x^2-38x-72=0

a = 3; b = -38; c = -72;
Δ = b2-4ac
Δ = -382-4·3·(-72)
Δ = 2308
The delta value is higher than zero, so the equation has two solutions
We use following formulas to calculate our solutions:
$x_{1}=\frac{-b-\sqrt{\Delta}}{2a}$
$x_{2}=\frac{-b+\sqrt{\Delta}}{2a}$

The end solution:

$\sqrt{\Delta}=\sqrt{2308}=\sqrt{4*577}=\sqrt{4}*\sqrt{577}=2\sqrt{577}$
$x_{1}=\frac{-b-\sqrt{\Delta}}{2a}=\frac{-(-38)-2\sqrt{577}}{2*3}=\frac{38-2\sqrt{577}}{6}
$
$x_{2}=\frac{-b+\sqrt{\Delta}}{2a}=\frac{-(-38)+2\sqrt{577}}{2*3}=\frac{38+2\sqrt{577}}{6}
$