g^2+8g=2

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Solution for g^2+8g=2 equation:


Simplifying
g2 + 8g = 2

Reorder the terms:
8g + g2 = 2

Solving
8g + g2 = 2

Solving for variable 'g'.

Reorder the terms:
-2 + 8g + g2 = 2 + -2

Combine like terms: 2 + -2 = 0
-2 + 8g + g2 = 0

Begin completing the square.

Move the constant term to the right:

Add '2' to each side of the equation.
-2 + 8g + 2 + g2 = 0 + 2

Reorder the terms:
-2 + 2 + 8g + g2 = 0 + 2

Combine like terms: -2 + 2 = 0
0 + 8g + g2 = 0 + 2
8g + g2 = 0 + 2

Combine like terms: 0 + 2 = 2
8g + g2 = 2

The g term is 8g.  Take half its coefficient (4).
Square it (16) and add it to both sides.

Add '16' to each side of the equation.
8g + 16 + g2 = 2 + 16

Reorder the terms:
16 + 8g + g2 = 2 + 16

Combine like terms: 2 + 16 = 18
16 + 8g + g2 = 18

Factor a perfect square on the left side:
(g + 4)(g + 4) = 18

Calculate the square root of the right side: 4.242640687

Break this problem into two subproblems by setting 
(g + 4) equal to 4.242640687 and -4.242640687.

Subproblem 1

g + 4 = 4.242640687 Simplifying g + 4 = 4.242640687 Reorder the terms: 4 + g = 4.242640687 Solving 4 + g = 4.242640687 Solving for variable 'g'. Move all terms containing g to the left, all other terms to the right. Add '-4' to each side of the equation. 4 + -4 + g = 4.242640687 + -4 Combine like terms: 4 + -4 = 0 0 + g = 4.242640687 + -4 g = 4.242640687 + -4 Combine like terms: 4.242640687 + -4 = 0.242640687 g = 0.242640687 Simplifying g = 0.242640687

Subproblem 2

g + 4 = -4.242640687 Simplifying g + 4 = -4.242640687 Reorder the terms: 4 + g = -4.242640687 Solving 4 + g = -4.242640687 Solving for variable 'g'. Move all terms containing g to the left, all other terms to the right. Add '-4' to each side of the equation. 4 + -4 + g = -4.242640687 + -4 Combine like terms: 4 + -4 = 0 0 + g = -4.242640687 + -4 g = -4.242640687 + -4 Combine like terms: -4.242640687 + -4 = -8.242640687 g = -8.242640687 Simplifying g = -8.242640687

Solution

The solution to the problem is based on the solutions from the subproblems. g = {0.242640687, -8.242640687}

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