12=3h^2+6h-4

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Solution for 12=3h^2+6h-4 equation:


Simplifying
12 = 3h2 + 6h + -4

Reorder the terms:
12 = -4 + 6h + 3h2

Solving
12 = -4 + 6h + 3h2

Solving for variable 'h'.

Combine like terms: 12 + 4 = 16
16 + -6h + -3h2 = -4 + 6h + 3h2 + 4 + -6h + -3h2

Reorder the terms:
16 + -6h + -3h2 = -4 + 4 + 6h + -6h + 3h2 + -3h2

Combine like terms: -4 + 4 = 0
16 + -6h + -3h2 = 0 + 6h + -6h + 3h2 + -3h2
16 + -6h + -3h2 = 6h + -6h + 3h2 + -3h2

Combine like terms: 6h + -6h = 0
16 + -6h + -3h2 = 0 + 3h2 + -3h2
16 + -6h + -3h2 = 3h2 + -3h2

Combine like terms: 3h2 + -3h2 = 0
16 + -6h + -3h2 = 0

Begin completing the square.  Divide all terms by
-3 the coefficient of the squared term: 

Divide each side by '-3'.
-5.333333333 + 2h + h2 = 0

Move the constant term to the right:

Add '5.333333333' to each side of the equation.
-5.333333333 + 2h + 5.333333333 + h2 = 0 + 5.333333333

Reorder the terms:
-5.333333333 + 5.333333333 + 2h + h2 = 0 + 5.333333333

Combine like terms: -5.333333333 + 5.333333333 = 0.000000000
0.000000000 + 2h + h2 = 0 + 5.333333333
2h + h2 = 0 + 5.333333333

Combine like terms: 0 + 5.333333333 = 5.333333333
2h + h2 = 5.333333333

The h term is 2h.  Take half its coefficient (1).
Square it (1) and add it to both sides.

Add '1' to each side of the equation.
2h + 1 + h2 = 5.333333333 + 1

Reorder the terms:
1 + 2h + h2 = 5.333333333 + 1

Combine like terms: 5.333333333 + 1 = 6.333333333
1 + 2h + h2 = 6.333333333

Factor a perfect square on the left side:
(h + 1)(h + 1) = 6.333333333

Calculate the square root of the right side: 2.516611478

Break this problem into two subproblems by setting 
(h + 1) equal to 2.516611478 and -2.516611478.

Subproblem 1

h + 1 = 2.516611478 Simplifying h + 1 = 2.516611478 Reorder the terms: 1 + h = 2.516611478 Solving 1 + h = 2.516611478 Solving for variable 'h'. Move all terms containing h to the left, all other terms to the right. Add '-1' to each side of the equation. 1 + -1 + h = 2.516611478 + -1 Combine like terms: 1 + -1 = 0 0 + h = 2.516611478 + -1 h = 2.516611478 + -1 Combine like terms: 2.516611478 + -1 = 1.516611478 h = 1.516611478 Simplifying h = 1.516611478

Subproblem 2

h + 1 = -2.516611478 Simplifying h + 1 = -2.516611478 Reorder the terms: 1 + h = -2.516611478 Solving 1 + h = -2.516611478 Solving for variable 'h'. Move all terms containing h to the left, all other terms to the right. Add '-1' to each side of the equation. 1 + -1 + h = -2.516611478 + -1 Combine like terms: 1 + -1 = 0 0 + h = -2.516611478 + -1 h = -2.516611478 + -1 Combine like terms: -2.516611478 + -1 = -3.516611478 h = -3.516611478 Simplifying h = -3.516611478

Solution

The solution to the problem is based on the solutions from the subproblems. h = {1.516611478, -3.516611478}

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