2h+3h^2=165

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Solution for 2h+3h^2=165 equation:


Simplifying
2h + 3h2 = 165

Solving
2h + 3h2 = 165

Solving for variable 'h'.

Reorder the terms:
-165 + 2h + 3h2 = 165 + -165

Combine like terms: 165 + -165 = 0
-165 + 2h + 3h2 = 0

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

Divide each side by '3'.
-55 + 0.6666666667h + h2 = 0

Move the constant term to the right:

Add '55' to each side of the equation.
-55 + 0.6666666667h + 55 + h2 = 0 + 55

Reorder the terms:
-55 + 55 + 0.6666666667h + h2 = 0 + 55

Combine like terms: -55 + 55 = 0
0 + 0.6666666667h + h2 = 0 + 55
0.6666666667h + h2 = 0 + 55

Combine like terms: 0 + 55 = 55
0.6666666667h + h2 = 55

The h term is 0.6666666667h.  Take half its coefficient (0.3333333334).
Square it (0.1111111112) and add it to both sides.

Add '0.1111111112' to each side of the equation.
0.6666666667h + 0.1111111112 + h2 = 55 + 0.1111111112

Reorder the terms:
0.1111111112 + 0.6666666667h + h2 = 55 + 0.1111111112

Combine like terms: 55 + 0.1111111112 = 55.1111111112
0.1111111112 + 0.6666666667h + h2 = 55.1111111112

Factor a perfect square on the left side:
(h + 0.3333333334)(h + 0.3333333334) = 55.1111111112

Calculate the square root of the right side: 7.423685817

Break this problem into two subproblems by setting 
(h + 0.3333333334) equal to 7.423685817 and -7.423685817.

Subproblem 1

h + 0.3333333334 = 7.423685817 Simplifying h + 0.3333333334 = 7.423685817 Reorder the terms: 0.3333333334 + h = 7.423685817 Solving 0.3333333334 + h = 7.423685817 Solving for variable 'h'. Move all terms containing h to the left, all other terms to the right. Add '-0.3333333334' to each side of the equation. 0.3333333334 + -0.3333333334 + h = 7.423685817 + -0.3333333334 Combine like terms: 0.3333333334 + -0.3333333334 = 0.0000000000 0.0000000000 + h = 7.423685817 + -0.3333333334 h = 7.423685817 + -0.3333333334 Combine like terms: 7.423685817 + -0.3333333334 = 7.0903524836 h = 7.0903524836 Simplifying h = 7.0903524836

Subproblem 2

h + 0.3333333334 = -7.423685817 Simplifying h + 0.3333333334 = -7.423685817 Reorder the terms: 0.3333333334 + h = -7.423685817 Solving 0.3333333334 + h = -7.423685817 Solving for variable 'h'. Move all terms containing h to the left, all other terms to the right. Add '-0.3333333334' to each side of the equation. 0.3333333334 + -0.3333333334 + h = -7.423685817 + -0.3333333334 Combine like terms: 0.3333333334 + -0.3333333334 = 0.0000000000 0.0000000000 + h = -7.423685817 + -0.3333333334 h = -7.423685817 + -0.3333333334 Combine like terms: -7.423685817 + -0.3333333334 = -7.7570191504 h = -7.7570191504 Simplifying h = -7.7570191504

Solution

The solution to the problem is based on the solutions from the subproblems. h = {7.0903524836, -7.7570191504}

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