g^2-2g-6=0

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Solution for g^2-2g-6=0 equation:


Simplifying
g2 + -2g + -6 = 0

Reorder the terms:
-6 + -2g + g2 = 0

Solving
-6 + -2g + g2 = 0

Solving for variable 'g'.

Begin completing the square.

Move the constant term to the right:

Add '6' to each side of the equation.
-6 + -2g + 6 + g2 = 0 + 6

Reorder the terms:
-6 + 6 + -2g + g2 = 0 + 6

Combine like terms: -6 + 6 = 0
0 + -2g + g2 = 0 + 6
-2g + g2 = 0 + 6

Combine like terms: 0 + 6 = 6
-2g + g2 = 6

The g term is -2g.  Take half its coefficient (-1).
Square it (1) and add it to both sides.

Add '1' to each side of the equation.
-2g + 1 + g2 = 6 + 1

Reorder the terms:
1 + -2g + g2 = 6 + 1

Combine like terms: 6 + 1 = 7
1 + -2g + g2 = 7

Factor a perfect square on the left side:
(g + -1)(g + -1) = 7

Calculate the square root of the right side: 2.645751311

Break this problem into two subproblems by setting 
(g + -1) equal to 2.645751311 and -2.645751311.

Subproblem 1

g + -1 = 2.645751311 Simplifying g + -1 = 2.645751311 Reorder the terms: -1 + g = 2.645751311 Solving -1 + g = 2.645751311 Solving for variable 'g'. Move all terms containing g to the left, all other terms to the right. Add '1' to each side of the equation. -1 + 1 + g = 2.645751311 + 1 Combine like terms: -1 + 1 = 0 0 + g = 2.645751311 + 1 g = 2.645751311 + 1 Combine like terms: 2.645751311 + 1 = 3.645751311 g = 3.645751311 Simplifying g = 3.645751311

Subproblem 2

g + -1 = -2.645751311 Simplifying g + -1 = -2.645751311 Reorder the terms: -1 + g = -2.645751311 Solving -1 + g = -2.645751311 Solving for variable 'g'. Move all terms containing g to the left, all other terms to the right. Add '1' to each side of the equation. -1 + 1 + g = -2.645751311 + 1 Combine like terms: -1 + 1 = 0 0 + g = -2.645751311 + 1 g = -2.645751311 + 1 Combine like terms: -2.645751311 + 1 = -1.645751311 g = -1.645751311 Simplifying g = -1.645751311

Solution

The solution to the problem is based on the solutions from the subproblems. g = {3.645751311, -1.645751311}

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