(5b^2-2b-6)-(-9b^2+3b+2)=

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Solution for (5b^2-2b-6)-(-9b^2+3b+2)= equation:


Simplifying
(5b2 + -2b + -6) + -1(-9b2 + 3b + 2) = 0

Reorder the terms:
(-6 + -2b + 5b2) + -1(-9b2 + 3b + 2) = 0

Remove parenthesis around (-6 + -2b + 5b2)
-6 + -2b + 5b2 + -1(-9b2 + 3b + 2) = 0

Reorder the terms:
-6 + -2b + 5b2 + -1(2 + 3b + -9b2) = 0
-6 + -2b + 5b2 + (2 * -1 + 3b * -1 + -9b2 * -1) = 0
-6 + -2b + 5b2 + (-2 + -3b + 9b2) = 0

Reorder the terms:
-6 + -2 + -2b + -3b + 5b2 + 9b2 = 0

Combine like terms: -6 + -2 = -8
-8 + -2b + -3b + 5b2 + 9b2 = 0

Combine like terms: -2b + -3b = -5b
-8 + -5b + 5b2 + 9b2 = 0

Combine like terms: 5b2 + 9b2 = 14b2
-8 + -5b + 14b2 = 0

Solving
-8 + -5b + 14b2 = 0

Solving for variable 'b'.

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

Divide each side by '14'.
-0.5714285714 + -0.3571428571b + b2 = 0

Move the constant term to the right:

Add '0.5714285714' to each side of the equation.
-0.5714285714 + -0.3571428571b + 0.5714285714 + b2 = 0 + 0.5714285714

Reorder the terms:
-0.5714285714 + 0.5714285714 + -0.3571428571b + b2 = 0 + 0.5714285714

Combine like terms: -0.5714285714 + 0.5714285714 = 0.0000000000
0.0000000000 + -0.3571428571b + b2 = 0 + 0.5714285714
-0.3571428571b + b2 = 0 + 0.5714285714

Combine like terms: 0 + 0.5714285714 = 0.5714285714
-0.3571428571b + b2 = 0.5714285714

The b term is -0.3571428571b.  Take half its coefficient (-0.1785714286).
Square it (0.03188775511) and add it to both sides.

Add '0.03188775511' to each side of the equation.
-0.3571428571b + 0.03188775511 + b2 = 0.5714285714 + 0.03188775511

Reorder the terms:
0.03188775511 + -0.3571428571b + b2 = 0.5714285714 + 0.03188775511

Combine like terms: 0.5714285714 + 0.03188775511 = 0.60331632651
0.03188775511 + -0.3571428571b + b2 = 0.60331632651

Factor a perfect square on the left side:
(b + -0.1785714286)(b + -0.1785714286) = 0.60331632651

Calculate the square root of the right side: 0.776734399

Break this problem into two subproblems by setting 
(b + -0.1785714286) equal to 0.776734399 and -0.776734399.

Subproblem 1

b + -0.1785714286 = 0.776734399 Simplifying b + -0.1785714286 = 0.776734399 Reorder the terms: -0.1785714286 + b = 0.776734399 Solving -0.1785714286 + b = 0.776734399 Solving for variable 'b'. Move all terms containing b to the left, all other terms to the right. Add '0.1785714286' to each side of the equation. -0.1785714286 + 0.1785714286 + b = 0.776734399 + 0.1785714286 Combine like terms: -0.1785714286 + 0.1785714286 = 0.0000000000 0.0000000000 + b = 0.776734399 + 0.1785714286 b = 0.776734399 + 0.1785714286 Combine like terms: 0.776734399 + 0.1785714286 = 0.9553058276 b = 0.9553058276 Simplifying b = 0.9553058276

Subproblem 2

b + -0.1785714286 = -0.776734399 Simplifying b + -0.1785714286 = -0.776734399 Reorder the terms: -0.1785714286 + b = -0.776734399 Solving -0.1785714286 + b = -0.776734399 Solving for variable 'b'. Move all terms containing b to the left, all other terms to the right. Add '0.1785714286' to each side of the equation. -0.1785714286 + 0.1785714286 + b = -0.776734399 + 0.1785714286 Combine like terms: -0.1785714286 + 0.1785714286 = 0.0000000000 0.0000000000 + b = -0.776734399 + 0.1785714286 b = -0.776734399 + 0.1785714286 Combine like terms: -0.776734399 + 0.1785714286 = -0.5981629704 b = -0.5981629704 Simplifying b = -0.5981629704

Solution

The solution to the problem is based on the solutions from the subproblems. b = {0.9553058276, -0.5981629704}

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