X2+14x=-2

Solution for X2+14x=-2 equation:

X2+14X=-2

We move all terms to the left:

X2+14X-(-2)=0

We add all the numbers together, and all the variables

X^2+14X+2=0

a = 1; b = 14; c = +2;
Δ = b2-4ac
Δ = 142-4·1·2
Δ = 188
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:

$\sqrt{\Delta}=\sqrt{188}=\sqrt{4*47}=\sqrt{4}*\sqrt{47}=2\sqrt{47}$
$X_{1}=\frac{-b-\sqrt{\Delta}}{2a}=\frac{-(14)-2\sqrt{47}}{2*1}=\frac{-14-2\sqrt{47}}{2}
$
$X_{2}=\frac{-b+\sqrt{\Delta}}{2a}=\frac{-(14)+2\sqrt{47}}{2*1}=\frac{-14+2\sqrt{47}}{2}
$