b^2+5b-35=0

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Solution for b^2+5b-35=0 equation:


Simplifying
b2 + 5b + -35 = 0

Reorder the terms:
-35 + 5b + b2 = 0

Solving
-35 + 5b + b2 = 0

Solving for variable 'b'.

Begin completing the square.

Move the constant term to the right:

Add '35' to each side of the equation.
-35 + 5b + 35 + b2 = 0 + 35

Reorder the terms:
-35 + 35 + 5b + b2 = 0 + 35

Combine like terms: -35 + 35 = 0
0 + 5b + b2 = 0 + 35
5b + b2 = 0 + 35

Combine like terms: 0 + 35 = 35
5b + b2 = 35

The b term is 5b.  Take half its coefficient (2.5).
Square it (6.25) and add it to both sides.

Add '6.25' to each side of the equation.
5b + 6.25 + b2 = 35 + 6.25

Reorder the terms:
6.25 + 5b + b2 = 35 + 6.25

Combine like terms: 35 + 6.25 = 41.25
6.25 + 5b + b2 = 41.25

Factor a perfect square on the left side:
(b + 2.5)(b + 2.5) = 41.25

Calculate the square root of the right side: 6.422616289

Break this problem into two subproblems by setting 
(b + 2.5) equal to 6.422616289 and -6.422616289.

Subproblem 1

b + 2.5 = 6.422616289 Simplifying b + 2.5 = 6.422616289 Reorder the terms: 2.5 + b = 6.422616289 Solving 2.5 + b = 6.422616289 Solving for variable 'b'. Move all terms containing b to the left, all other terms to the right. Add '-2.5' to each side of the equation. 2.5 + -2.5 + b = 6.422616289 + -2.5 Combine like terms: 2.5 + -2.5 = 0.0 0.0 + b = 6.422616289 + -2.5 b = 6.422616289 + -2.5 Combine like terms: 6.422616289 + -2.5 = 3.922616289 b = 3.922616289 Simplifying b = 3.922616289

Subproblem 2

b + 2.5 = -6.422616289 Simplifying b + 2.5 = -6.422616289 Reorder the terms: 2.5 + b = -6.422616289 Solving 2.5 + b = -6.422616289 Solving for variable 'b'. Move all terms containing b to the left, all other terms to the right. Add '-2.5' to each side of the equation. 2.5 + -2.5 + b = -6.422616289 + -2.5 Combine like terms: 2.5 + -2.5 = 0.0 0.0 + b = -6.422616289 + -2.5 b = -6.422616289 + -2.5 Combine like terms: -6.422616289 + -2.5 = -8.922616289 b = -8.922616289 Simplifying b = -8.922616289

Solution

The solution to the problem is based on the solutions from the subproblems. b = {3.922616289, -8.922616289}

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