.5(h+6)(h)=10

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Solution for .5(h+6)(h)=10 equation:


Simplifying
0.5(h + 6)(h) = 10

Reorder the terms:
0.5(6 + h)(h) = 10

Reorder the terms for easier multiplication:
0.5h(6 + h) = 10
(6 * 0.5h + h * 0.5h) = 10
(3h + 0.5h2) = 10

Solving
3h + 0.5h2 = 10

Solving for variable 'h'.

Reorder the terms:
-10 + 3h + 0.5h2 = 10 + -10

Combine like terms: 10 + -10 = 0
-10 + 3h + 0.5h2 = 0

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

Divide each side by '0.5'.
-20 + 6h + h2 = 0

Move the constant term to the right:

Add '20' to each side of the equation.
-20 + 6h + 20 + h2 = 0 + 20

Reorder the terms:
-20 + 20 + 6h + h2 = 0 + 20

Combine like terms: -20 + 20 = 0
0 + 6h + h2 = 0 + 20
6h + h2 = 0 + 20

Combine like terms: 0 + 20 = 20
6h + h2 = 20

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 = 20 + 9

Reorder the terms:
9 + 6h + h2 = 20 + 9

Combine like terms: 20 + 9 = 29
9 + 6h + h2 = 29

Factor a perfect square on the left side:
(h + 3)(h + 3) = 29

Calculate the square root of the right side: 5.385164807

Break this problem into two subproblems by setting 
(h + 3) equal to 5.385164807 and -5.385164807.

Subproblem 1

h + 3 = 5.385164807 Simplifying h + 3 = 5.385164807 Reorder the terms: 3 + h = 5.385164807 Solving 3 + h = 5.385164807 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 = 5.385164807 + -3 Combine like terms: 3 + -3 = 0 0 + h = 5.385164807 + -3 h = 5.385164807 + -3 Combine like terms: 5.385164807 + -3 = 2.385164807 h = 2.385164807 Simplifying h = 2.385164807

Subproblem 2

h + 3 = -5.385164807 Simplifying h + 3 = -5.385164807 Reorder the terms: 3 + h = -5.385164807 Solving 3 + h = -5.385164807 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 = -5.385164807 + -3 Combine like terms: 3 + -3 = 0 0 + h = -5.385164807 + -3 h = -5.385164807 + -3 Combine like terms: -5.385164807 + -3 = -8.385164807 h = -8.385164807 Simplifying h = -8.385164807

Solution

The solution to the problem is based on the solutions from the subproblems. h = {2.385164807, -8.385164807}

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