-4h^2-3h+9=0

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Solution for -4h^2-3h+9=0 equation:


Simplifying
-4h2 + -3h + 9 = 0

Reorder the terms:
9 + -3h + -4h2 = 0

Solving
9 + -3h + -4h2 = 0

Solving for variable 'h'.

Begin completing the square.  Divide all terms by
-4 the coefficient of the squared term: 

Divide each side by '-4'.
-2.25 + 0.75h + h2 = 0

Move the constant term to the right:

Add '2.25' to each side of the equation.
-2.25 + 0.75h + 2.25 + h2 = 0 + 2.25

Reorder the terms:
-2.25 + 2.25 + 0.75h + h2 = 0 + 2.25

Combine like terms: -2.25 + 2.25 = 0.00
0.00 + 0.75h + h2 = 0 + 2.25
0.75h + h2 = 0 + 2.25

Combine like terms: 0 + 2.25 = 2.25
0.75h + h2 = 2.25

The h term is 0.75h.  Take half its coefficient (0.375).
Square it (0.140625) and add it to both sides.

Add '0.140625' to each side of the equation.
0.75h + 0.140625 + h2 = 2.25 + 0.140625

Reorder the terms:
0.140625 + 0.75h + h2 = 2.25 + 0.140625

Combine like terms: 2.25 + 0.140625 = 2.390625
0.140625 + 0.75h + h2 = 2.390625

Factor a perfect square on the left side:
(h + 0.375)(h + 0.375) = 2.390625

Calculate the square root of the right side: 1.54616461

Break this problem into two subproblems by setting 
(h + 0.375) equal to 1.54616461 and -1.54616461.

Subproblem 1

h + 0.375 = 1.54616461 Simplifying h + 0.375 = 1.54616461 Reorder the terms: 0.375 + h = 1.54616461 Solving 0.375 + h = 1.54616461 Solving for variable 'h'. Move all terms containing h to the left, all other terms to the right. Add '-0.375' to each side of the equation. 0.375 + -0.375 + h = 1.54616461 + -0.375 Combine like terms: 0.375 + -0.375 = 0.000 0.000 + h = 1.54616461 + -0.375 h = 1.54616461 + -0.375 Combine like terms: 1.54616461 + -0.375 = 1.17116461 h = 1.17116461 Simplifying h = 1.17116461

Subproblem 2

h + 0.375 = -1.54616461 Simplifying h + 0.375 = -1.54616461 Reorder the terms: 0.375 + h = -1.54616461 Solving 0.375 + h = -1.54616461 Solving for variable 'h'. Move all terms containing h to the left, all other terms to the right. Add '-0.375' to each side of the equation. 0.375 + -0.375 + h = -1.54616461 + -0.375 Combine like terms: 0.375 + -0.375 = 0.000 0.000 + h = -1.54616461 + -0.375 h = -1.54616461 + -0.375 Combine like terms: -1.54616461 + -0.375 = -1.92116461 h = -1.92116461 Simplifying h = -1.92116461

Solution

The solution to the problem is based on the solutions from the subproblems. h = {1.17116461, -1.92116461}

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