g^2+18g=48

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Solution for g^2+18g=48 equation:


Simplifying
g2 + 18g = 48

Reorder the terms:
18g + g2 = 48

Solving
18g + g2 = 48

Solving for variable 'g'.

Reorder the terms:
-48 + 18g + g2 = 48 + -48

Combine like terms: 48 + -48 = 0
-48 + 18g + g2 = 0

Begin completing the square.

Move the constant term to the right:

Add '48' to each side of the equation.
-48 + 18g + 48 + g2 = 0 + 48

Reorder the terms:
-48 + 48 + 18g + g2 = 0 + 48

Combine like terms: -48 + 48 = 0
0 + 18g + g2 = 0 + 48
18g + g2 = 0 + 48

Combine like terms: 0 + 48 = 48
18g + g2 = 48

The g term is 18g.  Take half its coefficient (9).
Square it (81) and add it to both sides.

Add '81' to each side of the equation.
18g + 81 + g2 = 48 + 81

Reorder the terms:
81 + 18g + g2 = 48 + 81

Combine like terms: 48 + 81 = 129
81 + 18g + g2 = 129

Factor a perfect square on the left side:
(g + 9)(g + 9) = 129

Calculate the square root of the right side: 11.357816692

Break this problem into two subproblems by setting 
(g + 9) equal to 11.357816692 and -11.357816692.

Subproblem 1

g + 9 = 11.357816692 Simplifying g + 9 = 11.357816692 Reorder the terms: 9 + g = 11.357816692 Solving 9 + g = 11.357816692 Solving for variable 'g'. Move all terms containing g to the left, all other terms to the right. Add '-9' to each side of the equation. 9 + -9 + g = 11.357816692 + -9 Combine like terms: 9 + -9 = 0 0 + g = 11.357816692 + -9 g = 11.357816692 + -9 Combine like terms: 11.357816692 + -9 = 2.357816692 g = 2.357816692 Simplifying g = 2.357816692

Subproblem 2

g + 9 = -11.357816692 Simplifying g + 9 = -11.357816692 Reorder the terms: 9 + g = -11.357816692 Solving 9 + g = -11.357816692 Solving for variable 'g'. Move all terms containing g to the left, all other terms to the right. Add '-9' to each side of the equation. 9 + -9 + g = -11.357816692 + -9 Combine like terms: 9 + -9 = 0 0 + g = -11.357816692 + -9 g = -11.357816692 + -9 Combine like terms: -11.357816692 + -9 = -20.357816692 g = -20.357816692 Simplifying g = -20.357816692

Solution

The solution to the problem is based on the solutions from the subproblems. g = {2.357816692, -20.357816692}

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