7(4+h)h=9

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Solution for 7(4+h)h=9 equation:


Simplifying
7(4 + h) * h = 9

Reorder the terms for easier multiplication:
7h(4 + h) = 9
(4 * 7h + h * 7h) = 9
(28h + 7h2) = 9

Solving
28h + 7h2 = 9

Solving for variable 'h'.

Reorder the terms:
-9 + 28h + 7h2 = 9 + -9

Combine like terms: 9 + -9 = 0
-9 + 28h + 7h2 = 0

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

Divide each side by '7'.
-1.285714286 + 4h + h2 = 0

Move the constant term to the right:

Add '1.285714286' to each side of the equation.
-1.285714286 + 4h + 1.285714286 + h2 = 0 + 1.285714286

Reorder the terms:
-1.285714286 + 1.285714286 + 4h + h2 = 0 + 1.285714286

Combine like terms: -1.285714286 + 1.285714286 = 0.000000000
0.000000000 + 4h + h2 = 0 + 1.285714286
4h + h2 = 0 + 1.285714286

Combine like terms: 0 + 1.285714286 = 1.285714286
4h + h2 = 1.285714286

The h term is 4h.  Take half its coefficient (2).
Square it (4) and add it to both sides.

Add '4' to each side of the equation.
4h + 4 + h2 = 1.285714286 + 4

Reorder the terms:
4 + 4h + h2 = 1.285714286 + 4

Combine like terms: 1.285714286 + 4 = 5.285714286
4 + 4h + h2 = 5.285714286

Factor a perfect square on the left side:
(h + 2)(h + 2) = 5.285714286

Calculate the square root of the right side: 2.299068134

Break this problem into two subproblems by setting 
(h + 2) equal to 2.299068134 and -2.299068134.

Subproblem 1

h + 2 = 2.299068134 Simplifying h + 2 = 2.299068134 Reorder the terms: 2 + h = 2.299068134 Solving 2 + h = 2.299068134 Solving for variable 'h'. Move all terms containing h to the left, all other terms to the right. Add '-2' to each side of the equation. 2 + -2 + h = 2.299068134 + -2 Combine like terms: 2 + -2 = 0 0 + h = 2.299068134 + -2 h = 2.299068134 + -2 Combine like terms: 2.299068134 + -2 = 0.299068134 h = 0.299068134 Simplifying h = 0.299068134

Subproblem 2

h + 2 = -2.299068134 Simplifying h + 2 = -2.299068134 Reorder the terms: 2 + h = -2.299068134 Solving 2 + h = -2.299068134 Solving for variable 'h'. Move all terms containing h to the left, all other terms to the right. Add '-2' to each side of the equation. 2 + -2 + h = -2.299068134 + -2 Combine like terms: 2 + -2 = 0 0 + h = -2.299068134 + -2 h = -2.299068134 + -2 Combine like terms: -2.299068134 + -2 = -4.299068134 h = -4.299068134 Simplifying h = -4.299068134

Solution

The solution to the problem is based on the solutions from the subproblems. h = {0.299068134, -4.299068134}

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