h^2+8h+4=0

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Solution for h^2+8h+4=0 equation:


Simplifying
h2 + 8h + 4 = 0

Reorder the terms:
4 + 8h + h2 = 0

Solving
4 + 8h + h2 = 0

Solving for variable 'h'.

Begin completing the square.

Move the constant term to the right:

Add '-4' to each side of the equation.
4 + 8h + -4 + h2 = 0 + -4

Reorder the terms:
4 + -4 + 8h + h2 = 0 + -4

Combine like terms: 4 + -4 = 0
0 + 8h + h2 = 0 + -4
8h + h2 = 0 + -4

Combine like terms: 0 + -4 = -4
8h + h2 = -4

The h term is 8h.  Take half its coefficient (4).
Square it (16) and add it to both sides.

Add '16' to each side of the equation.
8h + 16 + h2 = -4 + 16

Reorder the terms:
16 + 8h + h2 = -4 + 16

Combine like terms: -4 + 16 = 12
16 + 8h + h2 = 12

Factor a perfect square on the left side:
(h + 4)(h + 4) = 12

Calculate the square root of the right side: 3.464101615

Break this problem into two subproblems by setting 
(h + 4) equal to 3.464101615 and -3.464101615.

Subproblem 1

h + 4 = 3.464101615 Simplifying h + 4 = 3.464101615 Reorder the terms: 4 + h = 3.464101615 Solving 4 + h = 3.464101615 Solving for variable 'h'. Move all terms containing h to the left, all other terms to the right. Add '-4' to each side of the equation. 4 + -4 + h = 3.464101615 + -4 Combine like terms: 4 + -4 = 0 0 + h = 3.464101615 + -4 h = 3.464101615 + -4 Combine like terms: 3.464101615 + -4 = -0.535898385 h = -0.535898385 Simplifying h = -0.535898385

Subproblem 2

h + 4 = -3.464101615 Simplifying h + 4 = -3.464101615 Reorder the terms: 4 + h = -3.464101615 Solving 4 + h = -3.464101615 Solving for variable 'h'. Move all terms containing h to the left, all other terms to the right. Add '-4' to each side of the equation. 4 + -4 + h = -3.464101615 + -4 Combine like terms: 4 + -4 = 0 0 + h = -3.464101615 + -4 h = -3.464101615 + -4 Combine like terms: -3.464101615 + -4 = -7.464101615 h = -7.464101615 Simplifying h = -7.464101615

Solution

The solution to the problem is based on the solutions from the subproblems. h = {-0.535898385, -7.464101615}

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