(x-3)(x+3)=(x-3*x-3)

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


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

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

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

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

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

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

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

Remove parenthesis around (-3 + -2x)
-9 + x2 = -3 + -2x

Solving
-9 + x2 = -3 + -2x

Solving for variable 'x'.

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

Combine like terms: -9 + 3 = -6
-6 + 2x + x2 = -3 + -2x + 3 + 2x

Reorder the terms:
-6 + 2x + x2 = -3 + 3 + -2x + 2x

Combine like terms: -3 + 3 = 0
-6 + 2x + x2 = 0 + -2x + 2x
-6 + 2x + x2 = -2x + 2x

Combine like terms: -2x + 2x = 0
-6 + 2x + x2 = 0

Begin completing the square.

Move the constant term to the right:

Add '6' to each side of the equation.
-6 + 2x + 6 + x2 = 0 + 6

Reorder the terms:
-6 + 6 + 2x + x2 = 0 + 6

Combine like terms: -6 + 6 = 0
0 + 2x + x2 = 0 + 6
2x + x2 = 0 + 6

Combine like terms: 0 + 6 = 6
2x + x2 = 6

The x term is 2x.  Take half its coefficient (1).
Square it (1) and add it to both sides.

Add '1' to each side of the equation.
2x + 1 + x2 = 6 + 1

Reorder the terms:
1 + 2x + x2 = 6 + 1

Combine like terms: 6 + 1 = 7
1 + 2x + x2 = 7

Factor a perfect square on the left side:
(x + 1)(x + 1) = 7

Calculate the square root of the right side: 2.645751311

Break this problem into two subproblems by setting 
(x + 1) equal to 2.645751311 and -2.645751311.

Subproblem 1

x + 1 = 2.645751311 Simplifying x + 1 = 2.645751311 Reorder the terms: 1 + x = 2.645751311 Solving 1 + x = 2.645751311 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-1' to each side of the equation. 1 + -1 + x = 2.645751311 + -1 Combine like terms: 1 + -1 = 0 0 + x = 2.645751311 + -1 x = 2.645751311 + -1 Combine like terms: 2.645751311 + -1 = 1.645751311 x = 1.645751311 Simplifying x = 1.645751311

Subproblem 2

x + 1 = -2.645751311 Simplifying x + 1 = -2.645751311 Reorder the terms: 1 + x = -2.645751311 Solving 1 + x = -2.645751311 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-1' to each side of the equation. 1 + -1 + x = -2.645751311 + -1 Combine like terms: 1 + -1 = 0 0 + x = -2.645751311 + -1 x = -2.645751311 + -1 Combine like terms: -2.645751311 + -1 = -3.645751311 x = -3.645751311 Simplifying x = -3.645751311

Solution

The solution to the problem is based on the solutions from the subproblems. x = {1.645751311, -3.645751311}

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