Solving the equation by completing the square method

In elementary algebra practice, completing the square is a technique for converting a quadratic polynomial of the form

to the form

In this context, "constant" means not depending on x. Evaluate the expression inside the parenthesis is of the form (x − constant). Thus one converts ax² + bx + c to

and one must find h and k.
Question:-

Solve the equation by completing the square method

x²-8x+12=0

Answer:-
now we solve this quadratic equation by completing the square method
x²-8x = -12


x²-8x+(8/2)²=(8/2)²-12


x²-8x+16=16-12

(x-4)²=4

taking the square root on both sides,or we can use square root calculator

√(x-4)²=√4

x-4 = ±2

x-4 = +2 or x-4 = -2

x=6 or x=2

so the answers are x=6 or 2