2h^2-5h-36=0

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Solution for 2h^2-5h-36=0 equation:


Simplifying
2h2 + -5h + -36 = 0

Reorder the terms:
-36 + -5h + 2h2 = 0

Solving
-36 + -5h + 2h2 = 0

Solving for variable 'h'.

Begin completing the square.  Divide all terms by
2 the coefficient of the squared term: 

Divide each side by '2'.
-18 + -2.5h + h2 = 0

Move the constant term to the right:

Add '18' to each side of the equation.
-18 + -2.5h + 18 + h2 = 0 + 18

Reorder the terms:
-18 + 18 + -2.5h + h2 = 0 + 18

Combine like terms: -18 + 18 = 0
0 + -2.5h + h2 = 0 + 18
-2.5h + h2 = 0 + 18

Combine like terms: 0 + 18 = 18
-2.5h + h2 = 18

The h term is -2.5h.  Take half its coefficient (-1.25).
Square it (1.5625) and add it to both sides.

Add '1.5625' to each side of the equation.
-2.5h + 1.5625 + h2 = 18 + 1.5625

Reorder the terms:
1.5625 + -2.5h + h2 = 18 + 1.5625

Combine like terms: 18 + 1.5625 = 19.5625
1.5625 + -2.5h + h2 = 19.5625

Factor a perfect square on the left side:
(h + -1.25)(h + -1.25) = 19.5625

Calculate the square root of the right side: 4.422951503

Break this problem into two subproblems by setting 
(h + -1.25) equal to 4.422951503 and -4.422951503.

Subproblem 1

h + -1.25 = 4.422951503 Simplifying h + -1.25 = 4.422951503 Reorder the terms: -1.25 + h = 4.422951503 Solving -1.25 + h = 4.422951503 Solving for variable 'h'. Move all terms containing h to the left, all other terms to the right. Add '1.25' to each side of the equation. -1.25 + 1.25 + h = 4.422951503 + 1.25 Combine like terms: -1.25 + 1.25 = 0.00 0.00 + h = 4.422951503 + 1.25 h = 4.422951503 + 1.25 Combine like terms: 4.422951503 + 1.25 = 5.672951503 h = 5.672951503 Simplifying h = 5.672951503

Subproblem 2

h + -1.25 = -4.422951503 Simplifying h + -1.25 = -4.422951503 Reorder the terms: -1.25 + h = -4.422951503 Solving -1.25 + h = -4.422951503 Solving for variable 'h'. Move all terms containing h to the left, all other terms to the right. Add '1.25' to each side of the equation. -1.25 + 1.25 + h = -4.422951503 + 1.25 Combine like terms: -1.25 + 1.25 = 0.00 0.00 + h = -4.422951503 + 1.25 h = -4.422951503 + 1.25 Combine like terms: -4.422951503 + 1.25 = -3.172951503 h = -3.172951503 Simplifying h = -3.172951503

Solution

The solution to the problem is based on the solutions from the subproblems. h = {5.672951503, -3.172951503}

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