b^2+8b+14=0

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Solution for b^2+8b+14=0 equation:


Simplifying
b2 + 8b + 14 = 0

Reorder the terms:
14 + 8b + b2 = 0

Solving
14 + 8b + b2 = 0

Solving for variable 'b'.

Begin completing the square.

Move the constant term to the right:

Add '-14' to each side of the equation.
14 + 8b + -14 + b2 = 0 + -14

Reorder the terms:
14 + -14 + 8b + b2 = 0 + -14

Combine like terms: 14 + -14 = 0
0 + 8b + b2 = 0 + -14
8b + b2 = 0 + -14

Combine like terms: 0 + -14 = -14
8b + b2 = -14

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

Add '16' to each side of the equation.
8b + 16 + b2 = -14 + 16

Reorder the terms:
16 + 8b + b2 = -14 + 16

Combine like terms: -14 + 16 = 2
16 + 8b + b2 = 2

Factor a perfect square on the left side:
(b + 4)(b + 4) = 2

Calculate the square root of the right side: 1.414213562

Break this problem into two subproblems by setting 
(b + 4) equal to 1.414213562 and -1.414213562.

Subproblem 1

b + 4 = 1.414213562 Simplifying b + 4 = 1.414213562 Reorder the terms: 4 + b = 1.414213562 Solving 4 + b = 1.414213562 Solving for variable 'b'. Move all terms containing b to the left, all other terms to the right. Add '-4' to each side of the equation. 4 + -4 + b = 1.414213562 + -4 Combine like terms: 4 + -4 = 0 0 + b = 1.414213562 + -4 b = 1.414213562 + -4 Combine like terms: 1.414213562 + -4 = -2.585786438 b = -2.585786438 Simplifying b = -2.585786438

Subproblem 2

b + 4 = -1.414213562 Simplifying b + 4 = -1.414213562 Reorder the terms: 4 + b = -1.414213562 Solving 4 + b = -1.414213562 Solving for variable 'b'. Move all terms containing b to the left, all other terms to the right. Add '-4' to each side of the equation. 4 + -4 + b = -1.414213562 + -4 Combine like terms: 4 + -4 = 0 0 + b = -1.414213562 + -4 b = -1.414213562 + -4 Combine like terms: -1.414213562 + -4 = -5.414213562 b = -5.414213562 Simplifying b = -5.414213562

Solution

The solution to the problem is based on the solutions from the subproblems. b = {-2.585786438, -5.414213562}

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