6(b-4)b=5

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Solution for 6(b-4)b=5 equation:


Simplifying
6(b + -4) * b = 5

Reorder the terms:
6(-4 + b) * b = 5

Reorder the terms for easier multiplication:
6b(-4 + b) = 5
(-4 * 6b + b * 6b) = 5
(-24b + 6b2) = 5

Solving
-24b + 6b2 = 5

Solving for variable 'b'.

Reorder the terms:
-5 + -24b + 6b2 = 5 + -5

Combine like terms: 5 + -5 = 0
-5 + -24b + 6b2 = 0

Begin completing the square.  Divide all terms by
6 the coefficient of the squared term: 

Divide each side by '6'.
-0.8333333333 + -4b + b2 = 0

Move the constant term to the right:

Add '0.8333333333' to each side of the equation.
-0.8333333333 + -4b + 0.8333333333 + b2 = 0 + 0.8333333333

Reorder the terms:
-0.8333333333 + 0.8333333333 + -4b + b2 = 0 + 0.8333333333

Combine like terms: -0.8333333333 + 0.8333333333 = 0.0000000000
0.0000000000 + -4b + b2 = 0 + 0.8333333333
-4b + b2 = 0 + 0.8333333333

Combine like terms: 0 + 0.8333333333 = 0.8333333333
-4b + b2 = 0.8333333333

The b term is -4b.  Take half its coefficient (-2).
Square it (4) and add it to both sides.

Add '4' to each side of the equation.
-4b + 4 + b2 = 0.8333333333 + 4

Reorder the terms:
4 + -4b + b2 = 0.8333333333 + 4

Combine like terms: 0.8333333333 + 4 = 4.8333333333
4 + -4b + b2 = 4.8333333333

Factor a perfect square on the left side:
(b + -2)(b + -2) = 4.8333333333

Calculate the square root of the right side: 2.198484326

Break this problem into two subproblems by setting 
(b + -2) equal to 2.198484326 and -2.198484326.

Subproblem 1

b + -2 = 2.198484326 Simplifying b + -2 = 2.198484326 Reorder the terms: -2 + b = 2.198484326 Solving -2 + b = 2.198484326 Solving for variable 'b'. Move all terms containing b to the left, all other terms to the right. Add '2' to each side of the equation. -2 + 2 + b = 2.198484326 + 2 Combine like terms: -2 + 2 = 0 0 + b = 2.198484326 + 2 b = 2.198484326 + 2 Combine like terms: 2.198484326 + 2 = 4.198484326 b = 4.198484326 Simplifying b = 4.198484326

Subproblem 2

b + -2 = -2.198484326 Simplifying b + -2 = -2.198484326 Reorder the terms: -2 + b = -2.198484326 Solving -2 + b = -2.198484326 Solving for variable 'b'. Move all terms containing b to the left, all other terms to the right. Add '2' to each side of the equation. -2 + 2 + b = -2.198484326 + 2 Combine like terms: -2 + 2 = 0 0 + b = -2.198484326 + 2 b = -2.198484326 + 2 Combine like terms: -2.198484326 + 2 = -0.198484326 b = -0.198484326 Simplifying b = -0.198484326

Solution

The solution to the problem is based on the solutions from the subproblems. b = {4.198484326, -0.198484326}

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