b^2+8b-35=0

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Solution for b^2+8b-35=0 equation:


Simplifying
b2 + 8b + -35 = 0

Reorder the terms:
-35 + 8b + b2 = 0

Solving
-35 + 8b + 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 + 8b + 35 + b2 = 0 + 35

Reorder the terms:
-35 + 35 + 8b + b2 = 0 + 35

Combine like terms: -35 + 35 = 0
0 + 8b + b2 = 0 + 35
8b + b2 = 0 + 35

Combine like terms: 0 + 35 = 35
8b + b2 = 35

The b term is 8b.  Take half its coefficient (4).
Square it (16) and add it to both sides.

Add '16' to each side of the equation.
8b + 16 + b2 = 35 + 16

Reorder the terms:
16 + 8b + b2 = 35 + 16

Combine like terms: 35 + 16 = 51
16 + 8b + b2 = 51

Factor a perfect square on the left side:
(b + 4)(b + 4) = 51

Calculate the square root of the right side: 7.141428429

Break this problem into two subproblems by setting 
(b + 4) equal to 7.141428429 and -7.141428429.

Subproblem 1

b + 4 = 7.141428429 Simplifying b + 4 = 7.141428429 Reorder the terms: 4 + b = 7.141428429 Solving 4 + b = 7.141428429 Solving for variable 'b'. Move all terms containing b to the left, all other terms to the right. Add '-4' to each side of the equation. 4 + -4 + b = 7.141428429 + -4 Combine like terms: 4 + -4 = 0 0 + b = 7.141428429 + -4 b = 7.141428429 + -4 Combine like terms: 7.141428429 + -4 = 3.141428429 b = 3.141428429 Simplifying b = 3.141428429

Subproblem 2

b + 4 = -7.141428429 Simplifying b + 4 = -7.141428429 Reorder the terms: 4 + b = -7.141428429 Solving 4 + b = -7.141428429 Solving for variable 'b'. Move all terms containing b to the left, all other terms to the right. Add '-4' to each side of the equation. 4 + -4 + b = -7.141428429 + -4 Combine like terms: 4 + -4 = 0 0 + b = -7.141428429 + -4 b = -7.141428429 + -4 Combine like terms: -7.141428429 + -4 = -11.141428429 b = -11.141428429 Simplifying b = -11.141428429

Solution

The solution to the problem is based on the solutions from the subproblems. b = {3.141428429, -11.141428429}

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