60=s^2+2*s*2

Solution for 60=s^2+2*s*2 equation:

60=s^2+2s*2

We move all terms to the left:

60-(s^2+2s*2)=0

We get rid of parentheses

-s^2-2s*2+60=0

We add all the numbers together, and all the variables

-1s^2-2s*2+60=0

Wy multiply elements

-1s^2-4s+60=0

a = -1; b = -4; c = +60;
Δ = b2-4ac
Δ = -42-4·(-1)·60
Δ = 256
The delta value is higher than zero, so the equation has two solutions
We use following formulas to calculate our solutions:
$s_{1}=\frac{-b-\sqrt{\Delta}}{2a}$
$s_{2}=\frac{-b+\sqrt{\Delta}}{2a}$

$\sqrt{\Delta}=\sqrt{256}=16$
$s_{1}=\frac{-b-\sqrt{\Delta}}{2a}=\frac{-(-4)-16}{2*-1}=\frac{-12}{-2}
=+6
$
$s_{2}=\frac{-b+\sqrt{\Delta}}{2a}=\frac{-(-4)+16}{2*-1}=\frac{20}{-2}
=-10
$