8h^2+9h+2=0

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Solution for 8h^2+9h+2=0 equation:


Simplifying
8h2 + 9h + 2 = 0

Reorder the terms:
2 + 9h + 8h2 = 0

Solving
2 + 9h + 8h2 = 0

Solving for variable 'h'.

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

Divide each side by '8'.
0.25 + 1.125h + h2 = 0

Move the constant term to the right:

Add '-0.25' to each side of the equation.
0.25 + 1.125h + -0.25 + h2 = 0 + -0.25

Reorder the terms:
0.25 + -0.25 + 1.125h + h2 = 0 + -0.25

Combine like terms: 0.25 + -0.25 = 0.00
0.00 + 1.125h + h2 = 0 + -0.25
1.125h + h2 = 0 + -0.25

Combine like terms: 0 + -0.25 = -0.25
1.125h + h2 = -0.25

The h term is 1.125h.  Take half its coefficient (0.5625).
Square it (0.31640625) and add it to both sides.

Add '0.31640625' to each side of the equation.
1.125h + 0.31640625 + h2 = -0.25 + 0.31640625

Reorder the terms:
0.31640625 + 1.125h + h2 = -0.25 + 0.31640625

Combine like terms: -0.25 + 0.31640625 = 0.06640625
0.31640625 + 1.125h + h2 = 0.06640625

Factor a perfect square on the left side:
(h + 0.5625)(h + 0.5625) = 0.06640625

Calculate the square root of the right side: 0.257694102

Break this problem into two subproblems by setting 
(h + 0.5625) equal to 0.257694102 and -0.257694102.

Subproblem 1

h + 0.5625 = 0.257694102 Simplifying h + 0.5625 = 0.257694102 Reorder the terms: 0.5625 + h = 0.257694102 Solving 0.5625 + h = 0.257694102 Solving for variable 'h'. Move all terms containing h to the left, all other terms to the right. Add '-0.5625' to each side of the equation. 0.5625 + -0.5625 + h = 0.257694102 + -0.5625 Combine like terms: 0.5625 + -0.5625 = 0.0000 0.0000 + h = 0.257694102 + -0.5625 h = 0.257694102 + -0.5625 Combine like terms: 0.257694102 + -0.5625 = -0.304805898 h = -0.304805898 Simplifying h = -0.304805898

Subproblem 2

h + 0.5625 = -0.257694102 Simplifying h + 0.5625 = -0.257694102 Reorder the terms: 0.5625 + h = -0.257694102 Solving 0.5625 + h = -0.257694102 Solving for variable 'h'. Move all terms containing h to the left, all other terms to the right. Add '-0.5625' to each side of the equation. 0.5625 + -0.5625 + h = -0.257694102 + -0.5625 Combine like terms: 0.5625 + -0.5625 = 0.0000 0.0000 + h = -0.257694102 + -0.5625 h = -0.257694102 + -0.5625 Combine like terms: -0.257694102 + -0.5625 = -0.820194102 h = -0.820194102 Simplifying h = -0.820194102

Solution

The solution to the problem is based on the solutions from the subproblems. h = {-0.304805898, -0.820194102}

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