g^2+20g+11=-69

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Solution for g^2+20g+11=-69 equation:


Simplifying
g2 + 20g + 11 = -69

Reorder the terms:
11 + 20g + g2 = -69

Solving
11 + 20g + g2 = -69

Solving for variable 'g'.

Reorder the terms:
11 + 69 + 20g + g2 = -69 + 69

Combine like terms: 11 + 69 = 80
80 + 20g + g2 = -69 + 69

Combine like terms: -69 + 69 = 0
80 + 20g + g2 = 0

Begin completing the square.

Move the constant term to the right:

Add '-80' to each side of the equation.
80 + 20g + -80 + g2 = 0 + -80

Reorder the terms:
80 + -80 + 20g + g2 = 0 + -80

Combine like terms: 80 + -80 = 0
0 + 20g + g2 = 0 + -80
20g + g2 = 0 + -80

Combine like terms: 0 + -80 = -80
20g + g2 = -80

The g term is 20g.  Take half its coefficient (10).
Square it (100) and add it to both sides.

Add '100' to each side of the equation.
20g + 100 + g2 = -80 + 100

Reorder the terms:
100 + 20g + g2 = -80 + 100

Combine like terms: -80 + 100 = 20
100 + 20g + g2 = 20

Factor a perfect square on the left side:
(g + 10)(g + 10) = 20

Calculate the square root of the right side: 4.472135955

Break this problem into two subproblems by setting 
(g + 10) equal to 4.472135955 and -4.472135955.

Subproblem 1

g + 10 = 4.472135955 Simplifying g + 10 = 4.472135955 Reorder the terms: 10 + g = 4.472135955 Solving 10 + g = 4.472135955 Solving for variable 'g'. Move all terms containing g to the left, all other terms to the right. Add '-10' to each side of the equation. 10 + -10 + g = 4.472135955 + -10 Combine like terms: 10 + -10 = 0 0 + g = 4.472135955 + -10 g = 4.472135955 + -10 Combine like terms: 4.472135955 + -10 = -5.527864045 g = -5.527864045 Simplifying g = -5.527864045

Subproblem 2

g + 10 = -4.472135955 Simplifying g + 10 = -4.472135955 Reorder the terms: 10 + g = -4.472135955 Solving 10 + g = -4.472135955 Solving for variable 'g'. Move all terms containing g to the left, all other terms to the right. Add '-10' to each side of the equation. 10 + -10 + g = -4.472135955 + -10 Combine like terms: 10 + -10 = 0 0 + g = -4.472135955 + -10 g = -4.472135955 + -10 Combine like terms: -4.472135955 + -10 = -14.472135955 g = -14.472135955 Simplifying g = -14.472135955

Solution

The solution to the problem is based on the solutions from the subproblems. g = {-5.527864045, -14.472135955}

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