z^2-6z=3

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Solution for z^2-6z=3 equation:


Simplifying
z2 + -6z = 3

Reorder the terms:
-6z + z2 = 3

Solving
-6z + z2 = 3

Solving for variable 'z'.

Reorder the terms:
-3 + -6z + z2 = 3 + -3

Combine like terms: 3 + -3 = 0
-3 + -6z + z2 = 0

Begin completing the square.

Move the constant term to the right:

Add '3' to each side of the equation.
-3 + -6z + 3 + z2 = 0 + 3

Reorder the terms:
-3 + 3 + -6z + z2 = 0 + 3

Combine like terms: -3 + 3 = 0
0 + -6z + z2 = 0 + 3
-6z + z2 = 0 + 3

Combine like terms: 0 + 3 = 3
-6z + z2 = 3

The z term is -6z.  Take half its coefficient (-3).
Square it (9) and add it to both sides.

Add '9' to each side of the equation.
-6z + 9 + z2 = 3 + 9

Reorder the terms:
9 + -6z + z2 = 3 + 9

Combine like terms: 3 + 9 = 12
9 + -6z + z2 = 12

Factor a perfect square on the left side:
(z + -3)(z + -3) = 12

Calculate the square root of the right side: 3.464101615

Break this problem into two subproblems by setting 
(z + -3) equal to 3.464101615 and -3.464101615.

Subproblem 1

z + -3 = 3.464101615 Simplifying z + -3 = 3.464101615 Reorder the terms: -3 + z = 3.464101615 Solving -3 + z = 3.464101615 Solving for variable 'z'. Move all terms containing z to the left, all other terms to the right. Add '3' to each side of the equation. -3 + 3 + z = 3.464101615 + 3 Combine like terms: -3 + 3 = 0 0 + z = 3.464101615 + 3 z = 3.464101615 + 3 Combine like terms: 3.464101615 + 3 = 6.464101615 z = 6.464101615 Simplifying z = 6.464101615

Subproblem 2

z + -3 = -3.464101615 Simplifying z + -3 = -3.464101615 Reorder the terms: -3 + z = -3.464101615 Solving -3 + z = -3.464101615 Solving for variable 'z'. Move all terms containing z to the left, all other terms to the right. Add '3' to each side of the equation. -3 + 3 + z = -3.464101615 + 3 Combine like terms: -3 + 3 = 0 0 + z = -3.464101615 + 3 z = -3.464101615 + 3 Combine like terms: -3.464101615 + 3 = -0.464101615 z = -0.464101615 Simplifying z = -0.464101615

Solution

The solution to the problem is based on the solutions from the subproblems. z = {6.464101615, -0.464101615}

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