Expand (x - 4)^2:
Subtract 12 from both sides to get one side to equal 0:
Find the values of a, b, and c in this quadratic equation:
The quadratic formula is expressed as follows:
Plug in our values into the formula:
Simplify the square root:
Prime factorize the square root:
Take any number that is repeated twice in the square root, and move it outside:
Solve the plus and minus:
The answer is {4 + 2√3, 4 - 2√3}.