2v^2-12v-40=0

Solution for 2v^2-12v-40=0 equation:

2v^2-12v-40=0

a = 2; b = -12; c = -40;
Δ = b2-4ac
Δ = -122-4·2·(-40)
Δ = 464
The delta value is higher than zero, so the equation has two solutions
We use following formulas to calculate our solutions:
$v_{1}=\frac{-b-\sqrt{\Delta}}{2a}$
$v_{2}=\frac{-b+\sqrt{\Delta}}{2a}$

The end solution:

$\sqrt{\Delta}=\sqrt{464}=\sqrt{16*29}=\sqrt{16}*\sqrt{29}=4\sqrt{29}$
$v_{1}=\frac{-b-\sqrt{\Delta}}{2a}=\frac{-(-12)-4\sqrt{29}}{2*2}=\frac{12-4\sqrt{29}}{4}
$
$v_{2}=\frac{-b+\sqrt{\Delta}}{2a}=\frac{-(-12)+4\sqrt{29}}{2*2}=\frac{12+4\sqrt{29}}{4}
$