-z^2=-12z+6

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Solution for -z^2=-12z+6 equation:


Simplifying
-1z2 = -12z + 6

Reorder the terms:
-1z2 = 6 + -12z

Solving
-1z2 = 6 + -12z

Solving for variable 'z'.

Reorder the terms:
-6 + 12z + -1z2 = 6 + -12z + -6 + 12z

Reorder the terms:
-6 + 12z + -1z2 = 6 + -6 + -12z + 12z

Combine like terms: 6 + -6 = 0
-6 + 12z + -1z2 = 0 + -12z + 12z
-6 + 12z + -1z2 = -12z + 12z

Combine like terms: -12z + 12z = 0
-6 + 12z + -1z2 = 0

Begin completing the square.  Divide all terms by
-1 the coefficient of the squared term: 

Divide each side by '-1'.
6 + -12z + z2 = 0

Move the constant term to the right:

Add '-6' to each side of the equation.
6 + -12z + -6 + z2 = 0 + -6

Reorder the terms:
6 + -6 + -12z + z2 = 0 + -6

Combine like terms: 6 + -6 = 0
0 + -12z + z2 = 0 + -6
-12z + z2 = 0 + -6

Combine like terms: 0 + -6 = -6
-12z + z2 = -6

The z term is -12z.  Take half its coefficient (-6).
Square it (36) and add it to both sides.

Add '36' to each side of the equation.
-12z + 36 + z2 = -6 + 36

Reorder the terms:
36 + -12z + z2 = -6 + 36

Combine like terms: -6 + 36 = 30
36 + -12z + z2 = 30

Factor a perfect square on the left side:
(z + -6)(z + -6) = 30

Calculate the square root of the right side: 5.477225575

Break this problem into two subproblems by setting 
(z + -6) equal to 5.477225575 and -5.477225575.

Subproblem 1

z + -6 = 5.477225575 Simplifying z + -6 = 5.477225575 Reorder the terms: -6 + z = 5.477225575 Solving -6 + z = 5.477225575 Solving for variable 'z'. Move all terms containing z to the left, all other terms to the right. Add '6' to each side of the equation. -6 + 6 + z = 5.477225575 + 6 Combine like terms: -6 + 6 = 0 0 + z = 5.477225575 + 6 z = 5.477225575 + 6 Combine like terms: 5.477225575 + 6 = 11.477225575 z = 11.477225575 Simplifying z = 11.477225575

Subproblem 2

z + -6 = -5.477225575 Simplifying z + -6 = -5.477225575 Reorder the terms: -6 + z = -5.477225575 Solving -6 + z = -5.477225575 Solving for variable 'z'. Move all terms containing z to the left, all other terms to the right. Add '6' to each side of the equation. -6 + 6 + z = -5.477225575 + 6 Combine like terms: -6 + 6 = 0 0 + z = -5.477225575 + 6 z = -5.477225575 + 6 Combine like terms: -5.477225575 + 6 = 0.522774425 z = 0.522774425 Simplifying z = 0.522774425

Solution

The solution to the problem is based on the solutions from the subproblems. z = {11.477225575, 0.522774425}

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