14b^2-29b-15=1

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Solution for 14b^2-29b-15=1 equation:


Simplifying
14b2 + -29b + -15 = 1

Reorder the terms:
-15 + -29b + 14b2 = 1

Solving
-15 + -29b + 14b2 = 1

Solving for variable 'b'.

Reorder the terms:
-15 + -1 + -29b + 14b2 = 1 + -1

Combine like terms: -15 + -1 = -16
-16 + -29b + 14b2 = 1 + -1

Combine like terms: 1 + -1 = 0
-16 + -29b + 14b2 = 0

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

Divide each side by '14'.
-1.142857143 + -2.071428571b + b2 = 0

Move the constant term to the right:

Add '1.142857143' to each side of the equation.
-1.142857143 + -2.071428571b + 1.142857143 + b2 = 0 + 1.142857143

Reorder the terms:
-1.142857143 + 1.142857143 + -2.071428571b + b2 = 0 + 1.142857143

Combine like terms: -1.142857143 + 1.142857143 = 0.000000000
0.000000000 + -2.071428571b + b2 = 0 + 1.142857143
-2.071428571b + b2 = 0 + 1.142857143

Combine like terms: 0 + 1.142857143 = 1.142857143
-2.071428571b + b2 = 1.142857143

The b term is -2.071428571b.  Take half its coefficient (-1.035714286).
Square it (1.072704082) and add it to both sides.

Add '1.072704082' to each side of the equation.
-2.071428571b + 1.072704082 + b2 = 1.142857143 + 1.072704082

Reorder the terms:
1.072704082 + -2.071428571b + b2 = 1.142857143 + 1.072704082

Combine like terms: 1.142857143 + 1.072704082 = 2.215561225
1.072704082 + -2.071428571b + b2 = 2.215561225

Factor a perfect square on the left side:
(b + -1.035714286)(b + -1.035714286) = 2.215561225

Calculate the square root of the right side: 1.488476142

Break this problem into two subproblems by setting 
(b + -1.035714286) equal to 1.488476142 and -1.488476142.

Subproblem 1

b + -1.035714286 = 1.488476142 Simplifying b + -1.035714286 = 1.488476142 Reorder the terms: -1.035714286 + b = 1.488476142 Solving -1.035714286 + b = 1.488476142 Solving for variable 'b'. Move all terms containing b to the left, all other terms to the right. Add '1.035714286' to each side of the equation. -1.035714286 + 1.035714286 + b = 1.488476142 + 1.035714286 Combine like terms: -1.035714286 + 1.035714286 = 0.000000000 0.000000000 + b = 1.488476142 + 1.035714286 b = 1.488476142 + 1.035714286 Combine like terms: 1.488476142 + 1.035714286 = 2.524190428 b = 2.524190428 Simplifying b = 2.524190428

Subproblem 2

b + -1.035714286 = -1.488476142 Simplifying b + -1.035714286 = -1.488476142 Reorder the terms: -1.035714286 + b = -1.488476142 Solving -1.035714286 + b = -1.488476142 Solving for variable 'b'. Move all terms containing b to the left, all other terms to the right. Add '1.035714286' to each side of the equation. -1.035714286 + 1.035714286 + b = -1.488476142 + 1.035714286 Combine like terms: -1.035714286 + 1.035714286 = 0.000000000 0.000000000 + b = -1.488476142 + 1.035714286 b = -1.488476142 + 1.035714286 Combine like terms: -1.488476142 + 1.035714286 = -0.452761856 b = -0.452761856 Simplifying b = -0.452761856

Solution

The solution to the problem is based on the solutions from the subproblems. b = {2.524190428, -0.452761856}

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