h^2+14h=9

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Solution for h^2+14h=9 equation:


Simplifying
h2 + 14h = 9

Reorder the terms:
14h + h2 = 9

Solving
14h + h2 = 9

Solving for variable 'h'.

Reorder the terms:
-9 + 14h + h2 = 9 + -9

Combine like terms: 9 + -9 = 0
-9 + 14h + h2 = 0

Begin completing the square.

Move the constant term to the right:

Add '9' to each side of the equation.
-9 + 14h + 9 + h2 = 0 + 9

Reorder the terms:
-9 + 9 + 14h + h2 = 0 + 9

Combine like terms: -9 + 9 = 0
0 + 14h + h2 = 0 + 9
14h + h2 = 0 + 9

Combine like terms: 0 + 9 = 9
14h + h2 = 9

The h term is 14h.  Take half its coefficient (7).
Square it (49) and add it to both sides.

Add '49' to each side of the equation.
14h + 49 + h2 = 9 + 49

Reorder the terms:
49 + 14h + h2 = 9 + 49

Combine like terms: 9 + 49 = 58
49 + 14h + h2 = 58

Factor a perfect square on the left side:
(h + 7)(h + 7) = 58

Calculate the square root of the right side: 7.615773106

Break this problem into two subproblems by setting 
(h + 7) equal to 7.615773106 and -7.615773106.

Subproblem 1

h + 7 = 7.615773106 Simplifying h + 7 = 7.615773106 Reorder the terms: 7 + h = 7.615773106 Solving 7 + h = 7.615773106 Solving for variable 'h'. Move all terms containing h to the left, all other terms to the right. Add '-7' to each side of the equation. 7 + -7 + h = 7.615773106 + -7 Combine like terms: 7 + -7 = 0 0 + h = 7.615773106 + -7 h = 7.615773106 + -7 Combine like terms: 7.615773106 + -7 = 0.615773106 h = 0.615773106 Simplifying h = 0.615773106

Subproblem 2

h + 7 = -7.615773106 Simplifying h + 7 = -7.615773106 Reorder the terms: 7 + h = -7.615773106 Solving 7 + h = -7.615773106 Solving for variable 'h'. Move all terms containing h to the left, all other terms to the right. Add '-7' to each side of the equation. 7 + -7 + h = -7.615773106 + -7 Combine like terms: 7 + -7 = 0 0 + h = -7.615773106 + -7 h = -7.615773106 + -7 Combine like terms: -7.615773106 + -7 = -14.615773106 h = -14.615773106 Simplifying h = -14.615773106

Solution

The solution to the problem is based on the solutions from the subproblems. h = {0.615773106, -14.615773106}

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