h^2-18h+13=0

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Solution for h^2-18h+13=0 equation:


Simplifying
h2 + -18h + 13 = 0

Reorder the terms:
13 + -18h + h2 = 0

Solving
13 + -18h + h2 = 0

Solving for variable 'h'.

Begin completing the square.

Move the constant term to the right:

Add '-13' to each side of the equation.
13 + -18h + -13 + h2 = 0 + -13

Reorder the terms:
13 + -13 + -18h + h2 = 0 + -13

Combine like terms: 13 + -13 = 0
0 + -18h + h2 = 0 + -13
-18h + h2 = 0 + -13

Combine like terms: 0 + -13 = -13
-18h + h2 = -13

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

Add '81' to each side of the equation.
-18h + 81 + h2 = -13 + 81

Reorder the terms:
81 + -18h + h2 = -13 + 81

Combine like terms: -13 + 81 = 68
81 + -18h + h2 = 68

Factor a perfect square on the left side:
(h + -9)(h + -9) = 68

Calculate the square root of the right side: 8.246211251

Break this problem into two subproblems by setting 
(h + -9) equal to 8.246211251 and -8.246211251.

Subproblem 1

h + -9 = 8.246211251 Simplifying h + -9 = 8.246211251 Reorder the terms: -9 + h = 8.246211251 Solving -9 + h = 8.246211251 Solving for variable 'h'. Move all terms containing h to the left, all other terms to the right. Add '9' to each side of the equation. -9 + 9 + h = 8.246211251 + 9 Combine like terms: -9 + 9 = 0 0 + h = 8.246211251 + 9 h = 8.246211251 + 9 Combine like terms: 8.246211251 + 9 = 17.246211251 h = 17.246211251 Simplifying h = 17.246211251

Subproblem 2

h + -9 = -8.246211251 Simplifying h + -9 = -8.246211251 Reorder the terms: -9 + h = -8.246211251 Solving -9 + h = -8.246211251 Solving for variable 'h'. Move all terms containing h to the left, all other terms to the right. Add '9' to each side of the equation. -9 + 9 + h = -8.246211251 + 9 Combine like terms: -9 + 9 = 0 0 + h = -8.246211251 + 9 h = -8.246211251 + 9 Combine like terms: -8.246211251 + 9 = 0.753788749 h = 0.753788749 Simplifying h = 0.753788749

Solution

The solution to the problem is based on the solutions from the subproblems. h = {17.246211251, 0.753788749}

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