h^2+6h-71=0

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Solution for h^2+6h-71=0 equation:


Simplifying
h2 + 6h + -71 = 0

Reorder the terms:
-71 + 6h + h2 = 0

Solving
-71 + 6h + h2 = 0

Solving for variable 'h'.

Begin completing the square.

Move the constant term to the right:

Add '71' to each side of the equation.
-71 + 6h + 71 + h2 = 0 + 71

Reorder the terms:
-71 + 71 + 6h + h2 = 0 + 71

Combine like terms: -71 + 71 = 0
0 + 6h + h2 = 0 + 71
6h + h2 = 0 + 71

Combine like terms: 0 + 71 = 71
6h + h2 = 71

The h term is 6h.  Take half its coefficient (3).
Square it (9) and add it to both sides.

Add '9' to each side of the equation.
6h + 9 + h2 = 71 + 9

Reorder the terms:
9 + 6h + h2 = 71 + 9

Combine like terms: 71 + 9 = 80
9 + 6h + h2 = 80

Factor a perfect square on the left side:
(h + 3)(h + 3) = 80

Calculate the square root of the right side: 8.94427191

Break this problem into two subproblems by setting 
(h + 3) equal to 8.94427191 and -8.94427191.

Subproblem 1

h + 3 = 8.94427191 Simplifying h + 3 = 8.94427191 Reorder the terms: 3 + h = 8.94427191 Solving 3 + h = 8.94427191 Solving for variable 'h'. Move all terms containing h to the left, all other terms to the right. Add '-3' to each side of the equation. 3 + -3 + h = 8.94427191 + -3 Combine like terms: 3 + -3 = 0 0 + h = 8.94427191 + -3 h = 8.94427191 + -3 Combine like terms: 8.94427191 + -3 = 5.94427191 h = 5.94427191 Simplifying h = 5.94427191

Subproblem 2

h + 3 = -8.94427191 Simplifying h + 3 = -8.94427191 Reorder the terms: 3 + h = -8.94427191 Solving 3 + h = -8.94427191 Solving for variable 'h'. Move all terms containing h to the left, all other terms to the right. Add '-3' to each side of the equation. 3 + -3 + h = -8.94427191 + -3 Combine like terms: 3 + -3 = 0 0 + h = -8.94427191 + -3 h = -8.94427191 + -3 Combine like terms: -8.94427191 + -3 = -11.94427191 h = -11.94427191 Simplifying h = -11.94427191

Solution

The solution to the problem is based on the solutions from the subproblems. h = {5.94427191, -11.94427191}

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