b^2+5=8b+0

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Solution for b^2+5=8b+0 equation:


Simplifying
b2 + 5 = 8b + 0

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

Reorder the terms:
5 + b2 = 0 + 8b
Remove the zero:
5 + b2 = 8b

Solving
5 + b2 = 8b

Solving for variable 'b'.

Reorder the terms:
5 + -8b + b2 = 8b + -8b

Combine like terms: 8b + -8b = 0
5 + -8b + b2 = 0

Begin completing the square.

Move the constant term to the right:

Add '-5' to each side of the equation.
5 + -8b + -5 + b2 = 0 + -5

Reorder the terms:
5 + -5 + -8b + b2 = 0 + -5

Combine like terms: 5 + -5 = 0
0 + -8b + b2 = 0 + -5
-8b + b2 = 0 + -5

Combine like terms: 0 + -5 = -5
-8b + b2 = -5

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 = -5 + 16

Reorder the terms:
16 + -8b + b2 = -5 + 16

Combine like terms: -5 + 16 = 11
16 + -8b + b2 = 11

Factor a perfect square on the left side:
(b + -4)(b + -4) = 11

Calculate the square root of the right side: 3.31662479

Break this problem into two subproblems by setting 
(b + -4) equal to 3.31662479 and -3.31662479.

Subproblem 1

b + -4 = 3.31662479 Simplifying b + -4 = 3.31662479 Reorder the terms: -4 + b = 3.31662479 Solving -4 + b = 3.31662479 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 = 3.31662479 + 4 Combine like terms: -4 + 4 = 0 0 + b = 3.31662479 + 4 b = 3.31662479 + 4 Combine like terms: 3.31662479 + 4 = 7.31662479 b = 7.31662479 Simplifying b = 7.31662479

Subproblem 2

b + -4 = -3.31662479 Simplifying b + -4 = -3.31662479 Reorder the terms: -4 + b = -3.31662479 Solving -4 + b = -3.31662479 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 = -3.31662479 + 4 Combine like terms: -4 + 4 = 0 0 + b = -3.31662479 + 4 b = -3.31662479 + 4 Combine like terms: -3.31662479 + 4 = 0.68337521 b = 0.68337521 Simplifying b = 0.68337521

Solution

The solution to the problem is based on the solutions from the subproblems. b = {7.31662479, 0.68337521}

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