b^2=14-15b

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Solution for b^2=14-15b equation:


Simplifying
b2 = 14 + -15b

Solving
b2 = 14 + -15b

Solving for variable 'b'.

Reorder the terms:
-14 + 15b + b2 = 14 + -15b + -14 + 15b

Reorder the terms:
-14 + 15b + b2 = 14 + -14 + -15b + 15b

Combine like terms: 14 + -14 = 0
-14 + 15b + b2 = 0 + -15b + 15b
-14 + 15b + b2 = -15b + 15b

Combine like terms: -15b + 15b = 0
-14 + 15b + b2 = 0

Begin completing the square.

Move the constant term to the right:

Add '14' to each side of the equation.
-14 + 15b + 14 + b2 = 0 + 14

Reorder the terms:
-14 + 14 + 15b + b2 = 0 + 14

Combine like terms: -14 + 14 = 0
0 + 15b + b2 = 0 + 14
15b + b2 = 0 + 14

Combine like terms: 0 + 14 = 14
15b + b2 = 14

The b term is 15b.  Take half its coefficient (7.5).
Square it (56.25) and add it to both sides.

Add '56.25' to each side of the equation.
15b + 56.25 + b2 = 14 + 56.25

Reorder the terms:
56.25 + 15b + b2 = 14 + 56.25

Combine like terms: 14 + 56.25 = 70.25
56.25 + 15b + b2 = 70.25

Factor a perfect square on the left side:
(b + 7.5)(b + 7.5) = 70.25

Calculate the square root of the right side: 8.381527307

Break this problem into two subproblems by setting 
(b + 7.5) equal to 8.381527307 and -8.381527307.

Subproblem 1

b + 7.5 = 8.381527307 Simplifying b + 7.5 = 8.381527307 Reorder the terms: 7.5 + b = 8.381527307 Solving 7.5 + b = 8.381527307 Solving for variable 'b'. Move all terms containing b to the left, all other terms to the right. Add '-7.5' to each side of the equation. 7.5 + -7.5 + b = 8.381527307 + -7.5 Combine like terms: 7.5 + -7.5 = 0.0 0.0 + b = 8.381527307 + -7.5 b = 8.381527307 + -7.5 Combine like terms: 8.381527307 + -7.5 = 0.881527307 b = 0.881527307 Simplifying b = 0.881527307

Subproblem 2

b + 7.5 = -8.381527307 Simplifying b + 7.5 = -8.381527307 Reorder the terms: 7.5 + b = -8.381527307 Solving 7.5 + b = -8.381527307 Solving for variable 'b'. Move all terms containing b to the left, all other terms to the right. Add '-7.5' to each side of the equation. 7.5 + -7.5 + b = -8.381527307 + -7.5 Combine like terms: 7.5 + -7.5 = 0.0 0.0 + b = -8.381527307 + -7.5 b = -8.381527307 + -7.5 Combine like terms: -8.381527307 + -7.5 = -15.881527307 b = -15.881527307 Simplifying b = -15.881527307

Solution

The solution to the problem is based on the solutions from the subproblems. b = {0.881527307, -15.881527307}

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