v^2+10v+15=1

Solution for v^2+10v+15=1 equation:

v^2+10v+15=1

We move all terms to the left:

v^2+10v+15-(1)=0

We add all the numbers together, and all the variables

v^2+10v+14=0

a = 1; b = 10; c = +14;
Δ = b2-4ac
Δ = 102-4·1·14
Δ = 44
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:

$\sqrt{\Delta}=\sqrt{44}=\sqrt{4*11}=\sqrt{4}*\sqrt{11}=2\sqrt{11}$
$v_{1}=\frac{-b-\sqrt{\Delta}}{2a}=\frac{-(10)-2\sqrt{11}}{2*1}=\frac{-10-2\sqrt{11}}{2}
$
$v_{2}=\frac{-b+\sqrt{\Delta}}{2a}=\frac{-(10)+2\sqrt{11}}{2*1}=\frac{-10+2\sqrt{11}}{2}
$