b^2-11b=10

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Solution for b^2-11b=10 equation:


Simplifying
b2 + -11b = 10

Reorder the terms:
-11b + b2 = 10

Solving
-11b + b2 = 10

Solving for variable 'b'.

Reorder the terms:
-10 + -11b + b2 = 10 + -10

Combine like terms: 10 + -10 = 0
-10 + -11b + b2 = 0

Begin completing the square.

Move the constant term to the right:

Add '10' to each side of the equation.
-10 + -11b + 10 + b2 = 0 + 10

Reorder the terms:
-10 + 10 + -11b + b2 = 0 + 10

Combine like terms: -10 + 10 = 0
0 + -11b + b2 = 0 + 10
-11b + b2 = 0 + 10

Combine like terms: 0 + 10 = 10
-11b + b2 = 10

The b term is -11b.  Take half its coefficient (-5.5).
Square it (30.25) and add it to both sides.

Add '30.25' to each side of the equation.
-11b + 30.25 + b2 = 10 + 30.25

Reorder the terms:
30.25 + -11b + b2 = 10 + 30.25

Combine like terms: 10 + 30.25 = 40.25
30.25 + -11b + b2 = 40.25

Factor a perfect square on the left side:
(b + -5.5)(b + -5.5) = 40.25

Calculate the square root of the right side: 6.34428877

Break this problem into two subproblems by setting 
(b + -5.5) equal to 6.34428877 and -6.34428877.

Subproblem 1

b + -5.5 = 6.34428877 Simplifying b + -5.5 = 6.34428877 Reorder the terms: -5.5 + b = 6.34428877 Solving -5.5 + b = 6.34428877 Solving for variable 'b'. Move all terms containing b to the left, all other terms to the right. Add '5.5' to each side of the equation. -5.5 + 5.5 + b = 6.34428877 + 5.5 Combine like terms: -5.5 + 5.5 = 0.0 0.0 + b = 6.34428877 + 5.5 b = 6.34428877 + 5.5 Combine like terms: 6.34428877 + 5.5 = 11.84428877 b = 11.84428877 Simplifying b = 11.84428877

Subproblem 2

b + -5.5 = -6.34428877 Simplifying b + -5.5 = -6.34428877 Reorder the terms: -5.5 + b = -6.34428877 Solving -5.5 + b = -6.34428877 Solving for variable 'b'. Move all terms containing b to the left, all other terms to the right. Add '5.5' to each side of the equation. -5.5 + 5.5 + b = -6.34428877 + 5.5 Combine like terms: -5.5 + 5.5 = 0.0 0.0 + b = -6.34428877 + 5.5 b = -6.34428877 + 5.5 Combine like terms: -6.34428877 + 5.5 = -0.84428877 b = -0.84428877 Simplifying b = -0.84428877

Solution

The solution to the problem is based on the solutions from the subproblems. b = {11.84428877, -0.84428877}

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