y2+2y=29

Solution for y2+2y=29 equation:

y2+2y=29

We move all terms to the left:

y2+2y-(29)=0

We add all the numbers together, and all the variables

y^2+2y-29=0

a = 1; b = 2; c = -29;
Δ = b2-4ac
Δ = 22-4·1·(-29)
Δ = 120
The delta value is higher than zero, so the equation has two solutions
We use following formulas to calculate our solutions:
$y_{1}=\frac{-b-\sqrt{\Delta}}{2a}$
$y_{2}=\frac{-b+\sqrt{\Delta}}{2a}$

The end solution:

$\sqrt{\Delta}=\sqrt{120}=\sqrt{4*30}=\sqrt{4}*\sqrt{30}=2\sqrt{30}$
$y_{1}=\frac{-b-\sqrt{\Delta}}{2a}=\frac{-(2)-2\sqrt{30}}{2*1}=\frac{-2-2\sqrt{30}}{2}
$
$y_{2}=\frac{-b+\sqrt{\Delta}}{2a}=\frac{-(2)+2\sqrt{30}}{2*1}=\frac{-2+2\sqrt{30}}{2}
$