b^2+14b-61=0

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Solution for b^2+14b-61=0 equation:


Simplifying
b2 + 14b + -61 = 0

Reorder the terms:
-61 + 14b + b2 = 0

Solving
-61 + 14b + b2 = 0

Solving for variable 'b'.

Begin completing the square.

Move the constant term to the right:

Add '61' to each side of the equation.
-61 + 14b + 61 + b2 = 0 + 61

Reorder the terms:
-61 + 61 + 14b + b2 = 0 + 61

Combine like terms: -61 + 61 = 0
0 + 14b + b2 = 0 + 61
14b + b2 = 0 + 61

Combine like terms: 0 + 61 = 61
14b + b2 = 61

The b term is 14b.  Take half its coefficient (7).
Square it (49) and add it to both sides.

Add '49' to each side of the equation.
14b + 49 + b2 = 61 + 49

Reorder the terms:
49 + 14b + b2 = 61 + 49

Combine like terms: 61 + 49 = 110
49 + 14b + b2 = 110

Factor a perfect square on the left side:
(b + 7)(b + 7) = 110

Calculate the square root of the right side: 10.488088482

Break this problem into two subproblems by setting 
(b + 7) equal to 10.488088482 and -10.488088482.

Subproblem 1

b + 7 = 10.488088482 Simplifying b + 7 = 10.488088482 Reorder the terms: 7 + b = 10.488088482 Solving 7 + b = 10.488088482 Solving for variable 'b'. Move all terms containing b to the left, all other terms to the right. Add '-7' to each side of the equation. 7 + -7 + b = 10.488088482 + -7 Combine like terms: 7 + -7 = 0 0 + b = 10.488088482 + -7 b = 10.488088482 + -7 Combine like terms: 10.488088482 + -7 = 3.488088482 b = 3.488088482 Simplifying b = 3.488088482

Subproblem 2

b + 7 = -10.488088482 Simplifying b + 7 = -10.488088482 Reorder the terms: 7 + b = -10.488088482 Solving 7 + b = -10.488088482 Solving for variable 'b'. Move all terms containing b to the left, all other terms to the right. Add '-7' to each side of the equation. 7 + -7 + b = -10.488088482 + -7 Combine like terms: 7 + -7 = 0 0 + b = -10.488088482 + -7 b = -10.488088482 + -7 Combine like terms: -10.488088482 + -7 = -17.488088482 b = -17.488088482 Simplifying b = -17.488088482

Solution

The solution to the problem is based on the solutions from the subproblems. b = {3.488088482, -17.488088482}

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