Question 289096
Equation: {{{X^2 = 4X + 96}}}
Set one side to 0
{{{X^2 - 4X - 96 = 0}}}
Use the quadratic equation
*[invoke quadratic "x", 1,-4, -96]

Using the quadratic equation gave us two answers: -8 & 12
Since you can not have a negative length, 12 is the length of 1 side