b^2=16b+64

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Solution for b^2=16b+64 equation:


Simplifying
b2 = 16b + 64

Reorder the terms:
b2 = 64 + 16b

Solving
b2 = 64 + 16b

Solving for variable 'b'.

Reorder the terms:
-64 + -16b + b2 = 64 + 16b + -64 + -16b

Reorder the terms:
-64 + -16b + b2 = 64 + -64 + 16b + -16b

Combine like terms: 64 + -64 = 0
-64 + -16b + b2 = 0 + 16b + -16b
-64 + -16b + b2 = 16b + -16b

Combine like terms: 16b + -16b = 0
-64 + -16b + b2 = 0

Begin completing the square.

Move the constant term to the right:

Add '64' to each side of the equation.
-64 + -16b + 64 + b2 = 0 + 64

Reorder the terms:
-64 + 64 + -16b + b2 = 0 + 64

Combine like terms: -64 + 64 = 0
0 + -16b + b2 = 0 + 64
-16b + b2 = 0 + 64

Combine like terms: 0 + 64 = 64
-16b + b2 = 64

The b term is -16b.  Take half its coefficient (-8).
Square it (64) and add it to both sides.

Add '64' to each side of the equation.
-16b + 64 + b2 = 64 + 64

Reorder the terms:
64 + -16b + b2 = 64 + 64

Combine like terms: 64 + 64 = 128
64 + -16b + b2 = 128

Factor a perfect square on the left side:
(b + -8)(b + -8) = 128

Calculate the square root of the right side: 11.313708499

Break this problem into two subproblems by setting 
(b + -8) equal to 11.313708499 and -11.313708499.

Subproblem 1

b + -8 = 11.313708499 Simplifying b + -8 = 11.313708499 Reorder the terms: -8 + b = 11.313708499 Solving -8 + b = 11.313708499 Solving for variable 'b'. Move all terms containing b to the left, all other terms to the right. Add '8' to each side of the equation. -8 + 8 + b = 11.313708499 + 8 Combine like terms: -8 + 8 = 0 0 + b = 11.313708499 + 8 b = 11.313708499 + 8 Combine like terms: 11.313708499 + 8 = 19.313708499 b = 19.313708499 Simplifying b = 19.313708499

Subproblem 2

b + -8 = -11.313708499 Simplifying b + -8 = -11.313708499 Reorder the terms: -8 + b = -11.313708499 Solving -8 + b = -11.313708499 Solving for variable 'b'. Move all terms containing b to the left, all other terms to the right. Add '8' to each side of the equation. -8 + 8 + b = -11.313708499 + 8 Combine like terms: -8 + 8 = 0 0 + b = -11.313708499 + 8 b = -11.313708499 + 8 Combine like terms: -11.313708499 + 8 = -3.313708499 b = -3.313708499 Simplifying b = -3.313708499

Solution

The solution to the problem is based on the solutions from the subproblems. b = {19.313708499, -3.313708499}

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