z^2-4z+24=0

Solution for z^2-4z+24=0 equation:

Simplifying
z2 + -4z + 24 = 0

Reorder the terms:
24 + -4z + z2 = 0

Solving
24 + -4z + z2 = 0

Solving for variable 'z'.

Begin completing the square.

Move the constant term to the right:

Add '-24' to each side of the equation.
24 + -4z + -24 + z2 = 0 + -24

Reorder the terms:
24 + -24 + -4z + z2 = 0 + -24

Combine like terms: 24 + -24 = 0
0 + -4z + z2 = 0 + -24
-4z + z2 = 0 + -24

Combine like terms: 0 + -24 = -24
-4z + z2 = -24

The z term is -4z.  Take half its coefficient (-2).
Square it (4) and add it to both sides.

Add '4' to each side of the equation.
-4z + 4 + z2 = -24 + 4

Reorder the terms:
4 + -4z + z2 = -24 + 4

Combine like terms: -24 + 4 = -20
4 + -4z + z2 = -20

Factor a perfect square on the left side:
(z + -2)(z + -2) = -20

Can't calculate square root of the right side.

The solution to this equation could not be determined.