b^2-2b-41=6

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Solution for b^2-2b-41=6 equation:


Simplifying
b2 + -2b + -41 = 6

Reorder the terms:
-41 + -2b + b2 = 6

Solving
-41 + -2b + b2 = 6

Solving for variable 'b'.

Reorder the terms:
-41 + -6 + -2b + b2 = 6 + -6

Combine like terms: -41 + -6 = -47
-47 + -2b + b2 = 6 + -6

Combine like terms: 6 + -6 = 0
-47 + -2b + b2 = 0

Begin completing the square.

Move the constant term to the right:

Add '47' to each side of the equation.
-47 + -2b + 47 + b2 = 0 + 47

Reorder the terms:
-47 + 47 + -2b + b2 = 0 + 47

Combine like terms: -47 + 47 = 0
0 + -2b + b2 = 0 + 47
-2b + b2 = 0 + 47

Combine like terms: 0 + 47 = 47
-2b + b2 = 47

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 = 47 + 1

Reorder the terms:
1 + -2b + b2 = 47 + 1

Combine like terms: 47 + 1 = 48
1 + -2b + b2 = 48

Factor a perfect square on the left side:
(b + -1)(b + -1) = 48

Calculate the square root of the right side: 6.92820323

Break this problem into two subproblems by setting 
(b + -1) equal to 6.92820323 and -6.92820323.

Subproblem 1

b + -1 = 6.92820323 Simplifying b + -1 = 6.92820323 Reorder the terms: -1 + b = 6.92820323 Solving -1 + b = 6.92820323 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 = 6.92820323 + 1 Combine like terms: -1 + 1 = 0 0 + b = 6.92820323 + 1 b = 6.92820323 + 1 Combine like terms: 6.92820323 + 1 = 7.92820323 b = 7.92820323 Simplifying b = 7.92820323

Subproblem 2

b + -1 = -6.92820323 Simplifying b + -1 = -6.92820323 Reorder the terms: -1 + b = -6.92820323 Solving -1 + b = -6.92820323 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 = -6.92820323 + 1 Combine like terms: -1 + 1 = 0 0 + b = -6.92820323 + 1 b = -6.92820323 + 1 Combine like terms: -6.92820323 + 1 = -5.92820323 b = -5.92820323 Simplifying b = -5.92820323

Solution

The solution to the problem is based on the solutions from the subproblems. b = {7.92820323, -5.92820323}

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