h^2+5h=155

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Solution for h^2+5h=155 equation:


Simplifying
h2 + 5h = 155

Reorder the terms:
5h + h2 = 155

Solving
5h + h2 = 155

Solving for variable 'h'.

Reorder the terms:
-155 + 5h + h2 = 155 + -155

Combine like terms: 155 + -155 = 0
-155 + 5h + h2 = 0

Begin completing the square.

Move the constant term to the right:

Add '155' to each side of the equation.
-155 + 5h + 155 + h2 = 0 + 155

Reorder the terms:
-155 + 155 + 5h + h2 = 0 + 155

Combine like terms: -155 + 155 = 0
0 + 5h + h2 = 0 + 155
5h + h2 = 0 + 155

Combine like terms: 0 + 155 = 155
5h + h2 = 155

The h term is 5h.  Take half its coefficient (2.5).
Square it (6.25) and add it to both sides.

Add '6.25' to each side of the equation.
5h + 6.25 + h2 = 155 + 6.25

Reorder the terms:
6.25 + 5h + h2 = 155 + 6.25

Combine like terms: 155 + 6.25 = 161.25
6.25 + 5h + h2 = 161.25

Factor a perfect square on the left side:
(h + 2.5)(h + 2.5) = 161.25

Calculate the square root of the right side: 12.698425099

Break this problem into two subproblems by setting 
(h + 2.5) equal to 12.698425099 and -12.698425099.

Subproblem 1

h + 2.5 = 12.698425099 Simplifying h + 2.5 = 12.698425099 Reorder the terms: 2.5 + h = 12.698425099 Solving 2.5 + h = 12.698425099 Solving for variable 'h'. Move all terms containing h to the left, all other terms to the right. Add '-2.5' to each side of the equation. 2.5 + -2.5 + h = 12.698425099 + -2.5 Combine like terms: 2.5 + -2.5 = 0.0 0.0 + h = 12.698425099 + -2.5 h = 12.698425099 + -2.5 Combine like terms: 12.698425099 + -2.5 = 10.198425099 h = 10.198425099 Simplifying h = 10.198425099

Subproblem 2

h + 2.5 = -12.698425099 Simplifying h + 2.5 = -12.698425099 Reorder the terms: 2.5 + h = -12.698425099 Solving 2.5 + h = -12.698425099 Solving for variable 'h'. Move all terms containing h to the left, all other terms to the right. Add '-2.5' to each side of the equation. 2.5 + -2.5 + h = -12.698425099 + -2.5 Combine like terms: 2.5 + -2.5 = 0.0 0.0 + h = -12.698425099 + -2.5 h = -12.698425099 + -2.5 Combine like terms: -12.698425099 + -2.5 = -15.198425099 h = -15.198425099 Simplifying h = -15.198425099

Solution

The solution to the problem is based on the solutions from the subproblems. h = {10.198425099, -15.198425099}

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