(x-3)(x+3)-(x+3)(x-3)=x-2(x+3)(x-3)

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Solution for (x-3)(x+3)-(x+3)(x-3)=x-2(x+3)(x-3) equation:


Simplifying
(x + -3)(x + 3) + -1(x + 3)(x + -3) = x + -2(x + 3)(x + -3)

Reorder the terms:
(-3 + x)(x + 3) + -1(x + 3)(x + -3) = x + -2(x + 3)(x + -3)

Reorder the terms:
(-3 + x)(3 + x) + -1(x + 3)(x + -3) = x + -2(x + 3)(x + -3)

Multiply (-3 + x) * (3 + x)
(-3(3 + x) + x(3 + x)) + -1(x + 3)(x + -3) = x + -2(x + 3)(x + -3)
((3 * -3 + x * -3) + x(3 + x)) + -1(x + 3)(x + -3) = x + -2(x + 3)(x + -3)
((-9 + -3x) + x(3 + x)) + -1(x + 3)(x + -3) = x + -2(x + 3)(x + -3)
(-9 + -3x + (3 * x + x * x)) + -1(x + 3)(x + -3) = x + -2(x + 3)(x + -3)
(-9 + -3x + (3x + x2)) + -1(x + 3)(x + -3) = x + -2(x + 3)(x + -3)

Combine like terms: -3x + 3x = 0
(-9 + 0 + x2) + -1(x + 3)(x + -3) = x + -2(x + 3)(x + -3)
(-9 + x2) + -1(x + 3)(x + -3) = x + -2(x + 3)(x + -3)

Reorder the terms:
-9 + x2 + -1(3 + x)(x + -3) = x + -2(x + 3)(x + -3)

Reorder the terms:
-9 + x2 + -1(3 + x)(-3 + x) = x + -2(x + 3)(x + -3)

Multiply (3 + x) * (-3 + x)
-9 + x2 + -1(3(-3 + x) + x(-3 + x)) = x + -2(x + 3)(x + -3)
-9 + x2 + -1((-3 * 3 + x * 3) + x(-3 + x)) = x + -2(x + 3)(x + -3)
-9 + x2 + -1((-9 + 3x) + x(-3 + x)) = x + -2(x + 3)(x + -3)
-9 + x2 + -1(-9 + 3x + (-3 * x + x * x)) = x + -2(x + 3)(x + -3)
-9 + x2 + -1(-9 + 3x + (-3x + x2)) = x + -2(x + 3)(x + -3)

Combine like terms: 3x + -3x = 0
-9 + x2 + -1(-9 + 0 + x2) = x + -2(x + 3)(x + -3)
-9 + x2 + -1(-9 + x2) = x + -2(x + 3)(x + -3)
-9 + x2 + (-9 * -1 + x2 * -1) = x + -2(x + 3)(x + -3)
-9 + x2 + (9 + -1x2) = x + -2(x + 3)(x + -3)

Reorder the terms:
-9 + 9 + x2 + -1x2 = x + -2(x + 3)(x + -3)

Combine like terms: -9 + 9 = 0
0 + x2 + -1x2 = x + -2(x + 3)(x + -3)
x2 + -1x2 = x + -2(x + 3)(x + -3)

Combine like terms: x2 + -1x2 = 0
0 = x + -2(x + 3)(x + -3)

Reorder the terms:
0 = x + -2(3 + x)(x + -3)

Reorder the terms:
0 = x + -2(3 + x)(-3 + x)

Multiply (3 + x) * (-3 + x)
0 = x + -2(3(-3 + x) + x(-3 + x))
0 = x + -2((-3 * 3 + x * 3) + x(-3 + x))
0 = x + -2((-9 + 3x) + x(-3 + x))
0 = x + -2(-9 + 3x + (-3 * x + x * x))
0 = x + -2(-9 + 3x + (-3x + x2))

Combine like terms: 3x + -3x = 0
0 = x + -2(-9 + 0 + x2)
0 = x + -2(-9 + x2)
0 = x + (-9 * -2 + x2 * -2)
0 = x + (18 + -2x2)

Reorder the terms:
0 = 18 + x + -2x2

Solving
0 = 18 + x + -2x2

Solving for variable 'x'.

Combine like terms: 0 + -18 = -18
-18 + -1x + 2x2 = 18 + x + -2x2 + -18 + -1x + 2x2

Reorder the terms:
-18 + -1x + 2x2 = 18 + -18 + x + -1x + -2x2 + 2x2

Combine like terms: 18 + -18 = 0
-18 + -1x + 2x2 = 0 + x + -1x + -2x2 + 2x2
-18 + -1x + 2x2 = x + -1x + -2x2 + 2x2

Combine like terms: x + -1x = 0
-18 + -1x + 2x2 = 0 + -2x2 + 2x2
-18 + -1x + 2x2 = -2x2 + 2x2

Combine like terms: -2x2 + 2x2 = 0
-18 + -1x + 2x2 = 0

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

Divide each side by '2'.
-9 + -0.5x + x2 = 0

Move the constant term to the right:

Add '9' to each side of the equation.
-9 + -0.5x + 9 + x2 = 0 + 9

Reorder the terms:
-9 + 9 + -0.5x + x2 = 0 + 9

Combine like terms: -9 + 9 = 0
0 + -0.5x + x2 = 0 + 9
-0.5x + x2 = 0 + 9

Combine like terms: 0 + 9 = 9
-0.5x + x2 = 9

The x term is -0.5x.  Take half its coefficient (-0.25).
Square it (0.0625) and add it to both sides.

Add '0.0625' to each side of the equation.
-0.5x + 0.0625 + x2 = 9 + 0.0625

Reorder the terms:
0.0625 + -0.5x + x2 = 9 + 0.0625

Combine like terms: 9 + 0.0625 = 9.0625
0.0625 + -0.5x + x2 = 9.0625

Factor a perfect square on the left side:
(x + -0.25)(x + -0.25) = 9.0625

Calculate the square root of the right side: 3.010398645

Break this problem into two subproblems by setting 
(x + -0.25) equal to 3.010398645 and -3.010398645.

Subproblem 1

x + -0.25 = 3.010398645 Simplifying x + -0.25 = 3.010398645 Reorder the terms: -0.25 + x = 3.010398645 Solving -0.25 + x = 3.010398645 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '0.25' to each side of the equation. -0.25 + 0.25 + x = 3.010398645 + 0.25 Combine like terms: -0.25 + 0.25 = 0.00 0.00 + x = 3.010398645 + 0.25 x = 3.010398645 + 0.25 Combine like terms: 3.010398645 + 0.25 = 3.260398645 x = 3.260398645 Simplifying x = 3.260398645

Subproblem 2

x + -0.25 = -3.010398645 Simplifying x + -0.25 = -3.010398645 Reorder the terms: -0.25 + x = -3.010398645 Solving -0.25 + x = -3.010398645 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '0.25' to each side of the equation. -0.25 + 0.25 + x = -3.010398645 + 0.25 Combine like terms: -0.25 + 0.25 = 0.00 0.00 + x = -3.010398645 + 0.25 x = -3.010398645 + 0.25 Combine like terms: -3.010398645 + 0.25 = -2.760398645 x = -2.760398645 Simplifying x = -2.760398645

Solution

The solution to the problem is based on the solutions from the subproblems. x = {3.260398645, -2.760398645}

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