6m^2-2m-7=0

Solution for 6m^2-2m-7=0 equation:

6m^2-2m-7=0

a = 6; b = -2; c = -7;
Δ = b2-4ac
Δ = -22-4·6·(-7)
Δ = 172
The delta value is higher than zero, so the equation has two solutions
We use following formulas to calculate our solutions:
$m_{1}=\frac{-b-\sqrt{\Delta}}{2a}$
$m_{2}=\frac{-b+\sqrt{\Delta}}{2a}$

The end solution:

$\sqrt{\Delta}=\sqrt{172}=\sqrt{4*43}=\sqrt{4}*\sqrt{43}=2\sqrt{43}$
$m_{1}=\frac{-b-\sqrt{\Delta}}{2a}=\frac{-(-2)-2\sqrt{43}}{2*6}=\frac{2-2\sqrt{43}}{12}
$
$m_{2}=\frac{-b+\sqrt{\Delta}}{2a}=\frac{-(-2)+2\sqrt{43}}{2*6}=\frac{2+2\sqrt{43}}{12}
$