-b*-b+6b+7=0

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Solution for -b*-b+6b+7=0 equation:


Simplifying
-1b * -1b + 6b + 7 = 0

Reorder the terms for easier multiplication:
-1 * -1b * b + 6b + 7 = 0

Multiply -1 * -1
1b * b + 6b + 7 = 0

Multiply b * b
1b2 + 6b + 7 = 0

Reorder the terms:
7 + 6b + 1b2 = 0

Solving
7 + 6b + 1b2 = 0

Solving for variable 'b'.

Begin completing the square.

Move the constant term to the right:

Add '-7' to each side of the equation.
7 + 6b + -7 + b2 = 0 + -7

Reorder the terms:
7 + -7 + 6b + b2 = 0 + -7

Combine like terms: 7 + -7 = 0
0 + 6b + b2 = 0 + -7
6b + b2 = 0 + -7

Combine like terms: 0 + -7 = -7
6b + b2 = -7

The b term is 6b.  Take half its coefficient (3).
Square it (9) and add it to both sides.

Add '9' to each side of the equation.
6b + 9 + b2 = -7 + 9

Reorder the terms:
9 + 6b + b2 = -7 + 9

Combine like terms: -7 + 9 = 2
9 + 6b + b2 = 2

Factor a perfect square on the left side:
(b + 3)(b + 3) = 2

Calculate the square root of the right side: 1.414213562

Break this problem into two subproblems by setting 
(b + 3) equal to 1.414213562 and -1.414213562.

Subproblem 1

b + 3 = 1.414213562 Simplifying b + 3 = 1.414213562 Reorder the terms: 3 + b = 1.414213562 Solving 3 + b = 1.414213562 Solving for variable 'b'. Move all terms containing b to the left, all other terms to the right. Add '-3' to each side of the equation. 3 + -3 + b = 1.414213562 + -3 Combine like terms: 3 + -3 = 0 0 + b = 1.414213562 + -3 b = 1.414213562 + -3 Combine like terms: 1.414213562 + -3 = -1.585786438 b = -1.585786438 Simplifying b = -1.585786438

Subproblem 2

b + 3 = -1.414213562 Simplifying b + 3 = -1.414213562 Reorder the terms: 3 + b = -1.414213562 Solving 3 + b = -1.414213562 Solving for variable 'b'. Move all terms containing b to the left, all other terms to the right. Add '-3' to each side of the equation. 3 + -3 + b = -1.414213562 + -3 Combine like terms: 3 + -3 = 0 0 + b = -1.414213562 + -3 b = -1.414213562 + -3 Combine like terms: -1.414213562 + -3 = -4.414213562 b = -4.414213562 Simplifying b = -4.414213562

Solution

The solution to the problem is based on the solutions from the subproblems. b = {-1.585786438, -4.414213562}

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