g^2-10g+20=0

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Solution for g^2-10g+20=0 equation:


Simplifying
g2 + -10g + 20 = 0

Reorder the terms:
20 + -10g + g2 = 0

Solving
20 + -10g + g2 = 0

Solving for variable 'g'.

Begin completing the square.

Move the constant term to the right:

Add '-20' to each side of the equation.
20 + -10g + -20 + g2 = 0 + -20

Reorder the terms:
20 + -20 + -10g + g2 = 0 + -20

Combine like terms: 20 + -20 = 0
0 + -10g + g2 = 0 + -20
-10g + g2 = 0 + -20

Combine like terms: 0 + -20 = -20
-10g + g2 = -20

The g term is -10g.  Take half its coefficient (-5).
Square it (25) and add it to both sides.

Add '25' to each side of the equation.
-10g + 25 + g2 = -20 + 25

Reorder the terms:
25 + -10g + g2 = -20 + 25

Combine like terms: -20 + 25 = 5
25 + -10g + g2 = 5

Factor a perfect square on the left side:
(g + -5)(g + -5) = 5

Calculate the square root of the right side: 2.236067978

Break this problem into two subproblems by setting 
(g + -5) equal to 2.236067978 and -2.236067978.

Subproblem 1

g + -5 = 2.236067978 Simplifying g + -5 = 2.236067978 Reorder the terms: -5 + g = 2.236067978 Solving -5 + g = 2.236067978 Solving for variable 'g'. Move all terms containing g to the left, all other terms to the right. Add '5' to each side of the equation. -5 + 5 + g = 2.236067978 + 5 Combine like terms: -5 + 5 = 0 0 + g = 2.236067978 + 5 g = 2.236067978 + 5 Combine like terms: 2.236067978 + 5 = 7.236067978 g = 7.236067978 Simplifying g = 7.236067978

Subproblem 2

g + -5 = -2.236067978 Simplifying g + -5 = -2.236067978 Reorder the terms: -5 + g = -2.236067978 Solving -5 + g = -2.236067978 Solving for variable 'g'. Move all terms containing g to the left, all other terms to the right. Add '5' to each side of the equation. -5 + 5 + g = -2.236067978 + 5 Combine like terms: -5 + 5 = 0 0 + g = -2.236067978 + 5 g = -2.236067978 + 5 Combine like terms: -2.236067978 + 5 = 2.763932022 g = 2.763932022 Simplifying g = 2.763932022

Solution

The solution to the problem is based on the solutions from the subproblems. g = {7.236067978, 2.763932022}

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