.25(2b-12)+b^2=.5+22

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Solution for .25(2b-12)+b^2=.5+22 equation:


Simplifying
0.25(2b + -12) + b2 = 0.5 + 22

Reorder the terms:
0.25(-12 + 2b) + b2 = 0.5 + 22
(-12 * 0.25 + 2b * 0.25) + b2 = 0.5 + 22
(-3 + 0.5b) + b2 = 0.5 + 22

Combine like terms: 0.5 + 22 = 22.5
-3 + 0.5b + b2 = 22.5

Solving
-3 + 0.5b + b2 = 22.5

Solving for variable 'b'.

Reorder the terms:
-3 + -22.5 + 0.5b + b2 = 22.5 + -22.5

Combine like terms: -3 + -22.5 = -25.5
-25.5 + 0.5b + b2 = 22.5 + -22.5

Combine like terms: 22.5 + -22.5 = 0.0
-25.5 + 0.5b + b2 = 0.0

Begin completing the square.

Move the constant term to the right:

Add '25.5' to each side of the equation.
-25.5 + 0.5b + 25.5 + b2 = 0.0 + 25.5

Reorder the terms:
-25.5 + 25.5 + 0.5b + b2 = 0.0 + 25.5

Combine like terms: -25.5 + 25.5 = 0.0
0.0 + 0.5b + b2 = 0.0 + 25.5
0.5b + b2 = 0.0 + 25.5

Combine like terms: 0.0 + 25.5 = 25.5
0.5b + b2 = 25.5

The b term is 0.5b.  Take half its coefficient (0.25).
Square it (0.0625) and add it to both sides.

Add '0.0625' to each side of the equation.
0.5b + 0.0625 + b2 = 25.5 + 0.0625

Reorder the terms:
0.0625 + 0.5b + b2 = 25.5 + 0.0625

Combine like terms: 25.5 + 0.0625 = 25.5625
0.0625 + 0.5b + b2 = 25.5625

Factor a perfect square on the left side:
(b + 0.25)(b + 0.25) = 25.5625

Calculate the square root of the right side: 5.055937104

Break this problem into two subproblems by setting 
(b + 0.25) equal to 5.055937104 and -5.055937104.

Subproblem 1

b + 0.25 = 5.055937104 Simplifying b + 0.25 = 5.055937104 Reorder the terms: 0.25 + b = 5.055937104 Solving 0.25 + b = 5.055937104 Solving for variable 'b'. Move all terms containing b to the left, all other terms to the right. Add '-0.25' to each side of the equation. 0.25 + -0.25 + b = 5.055937104 + -0.25 Combine like terms: 0.25 + -0.25 = 0.00 0.00 + b = 5.055937104 + -0.25 b = 5.055937104 + -0.25 Combine like terms: 5.055937104 + -0.25 = 4.805937104 b = 4.805937104 Simplifying b = 4.805937104

Subproblem 2

b + 0.25 = -5.055937104 Simplifying b + 0.25 = -5.055937104 Reorder the terms: 0.25 + b = -5.055937104 Solving 0.25 + b = -5.055937104 Solving for variable 'b'. Move all terms containing b to the left, all other terms to the right. Add '-0.25' to each side of the equation. 0.25 + -0.25 + b = -5.055937104 + -0.25 Combine like terms: 0.25 + -0.25 = 0.00 0.00 + b = -5.055937104 + -0.25 b = -5.055937104 + -0.25 Combine like terms: -5.055937104 + -0.25 = -5.305937104 b = -5.305937104 Simplifying b = -5.305937104

Solution

The solution to the problem is based on the solutions from the subproblems. b = {4.805937104, -5.305937104}

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