b^2-2b-58=-8

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Solution for b^2-2b-58=-8 equation:


Simplifying
b2 + -2b + -58 = -8

Reorder the terms:
-58 + -2b + b2 = -8

Solving
-58 + -2b + b2 = -8

Solving for variable 'b'.

Reorder the terms:
-58 + 8 + -2b + b2 = -8 + 8

Combine like terms: -58 + 8 = -50
-50 + -2b + b2 = -8 + 8

Combine like terms: -8 + 8 = 0
-50 + -2b + b2 = 0

Begin completing the square.

Move the constant term to the right:

Add '50' to each side of the equation.
-50 + -2b + 50 + b2 = 0 + 50

Reorder the terms:
-50 + 50 + -2b + b2 = 0 + 50

Combine like terms: -50 + 50 = 0
0 + -2b + b2 = 0 + 50
-2b + b2 = 0 + 50

Combine like terms: 0 + 50 = 50
-2b + b2 = 50

The b term is -2b.  Take half its coefficient (-1).
Square it (1) and add it to both sides.

Add '1' to each side of the equation.
-2b + 1 + b2 = 50 + 1

Reorder the terms:
1 + -2b + b2 = 50 + 1

Combine like terms: 50 + 1 = 51
1 + -2b + b2 = 51

Factor a perfect square on the left side:
(b + -1)(b + -1) = 51

Calculate the square root of the right side: 7.141428429

Break this problem into two subproblems by setting 
(b + -1) equal to 7.141428429 and -7.141428429.

Subproblem 1

b + -1 = 7.141428429 Simplifying b + -1 = 7.141428429 Reorder the terms: -1 + b = 7.141428429 Solving -1 + b = 7.141428429 Solving for variable 'b'. Move all terms containing b to the left, all other terms to the right. Add '1' to each side of the equation. -1 + 1 + b = 7.141428429 + 1 Combine like terms: -1 + 1 = 0 0 + b = 7.141428429 + 1 b = 7.141428429 + 1 Combine like terms: 7.141428429 + 1 = 8.141428429 b = 8.141428429 Simplifying b = 8.141428429

Subproblem 2

b + -1 = -7.141428429 Simplifying b + -1 = -7.141428429 Reorder the terms: -1 + b = -7.141428429 Solving -1 + b = -7.141428429 Solving for variable 'b'. Move all terms containing b to the left, all other terms to the right. Add '1' to each side of the equation. -1 + 1 + b = -7.141428429 + 1 Combine like terms: -1 + 1 = 0 0 + b = -7.141428429 + 1 b = -7.141428429 + 1 Combine like terms: -7.141428429 + 1 = -6.141428429 b = -6.141428429 Simplifying b = -6.141428429

Solution

The solution to the problem is based on the solutions from the subproblems. b = {8.141428429, -6.141428429}

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