h^2+28h-31=0

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Solution for h^2+28h-31=0 equation:


Simplifying
h2 + 28h + -31 = 0

Reorder the terms:
-31 + 28h + h2 = 0

Solving
-31 + 28h + h2 = 0

Solving for variable 'h'.

Begin completing the square.

Move the constant term to the right:

Add '31' to each side of the equation.
-31 + 28h + 31 + h2 = 0 + 31

Reorder the terms:
-31 + 31 + 28h + h2 = 0 + 31

Combine like terms: -31 + 31 = 0
0 + 28h + h2 = 0 + 31
28h + h2 = 0 + 31

Combine like terms: 0 + 31 = 31
28h + h2 = 31

The h term is 28h.  Take half its coefficient (14).
Square it (196) and add it to both sides.

Add '196' to each side of the equation.
28h + 196 + h2 = 31 + 196

Reorder the terms:
196 + 28h + h2 = 31 + 196

Combine like terms: 31 + 196 = 227
196 + 28h + h2 = 227

Factor a perfect square on the left side:
(h + 14)(h + 14) = 227

Calculate the square root of the right side: 15.066519173

Break this problem into two subproblems by setting 
(h + 14) equal to 15.066519173 and -15.066519173.

Subproblem 1

h + 14 = 15.066519173 Simplifying h + 14 = 15.066519173 Reorder the terms: 14 + h = 15.066519173 Solving 14 + h = 15.066519173 Solving for variable 'h'. Move all terms containing h to the left, all other terms to the right. Add '-14' to each side of the equation. 14 + -14 + h = 15.066519173 + -14 Combine like terms: 14 + -14 = 0 0 + h = 15.066519173 + -14 h = 15.066519173 + -14 Combine like terms: 15.066519173 + -14 = 1.066519173 h = 1.066519173 Simplifying h = 1.066519173

Subproblem 2

h + 14 = -15.066519173 Simplifying h + 14 = -15.066519173 Reorder the terms: 14 + h = -15.066519173 Solving 14 + h = -15.066519173 Solving for variable 'h'. Move all terms containing h to the left, all other terms to the right. Add '-14' to each side of the equation. 14 + -14 + h = -15.066519173 + -14 Combine like terms: 14 + -14 = 0 0 + h = -15.066519173 + -14 h = -15.066519173 + -14 Combine like terms: -15.066519173 + -14 = -29.066519173 h = -29.066519173 Simplifying h = -29.066519173

Solution

The solution to the problem is based on the solutions from the subproblems. h = {1.066519173, -29.066519173}

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