(x-6)=(x+8)(x-3)

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Solution for (x-6)=(x+8)(x-3) equation:


Simplifying
(x + -6) = (x + 8)(x + -3)

Reorder the terms:
(-6 + x) = (x + 8)(x + -3)

Remove parenthesis around (-6 + x)
-6 + x = (x + 8)(x + -3)

Reorder the terms:
-6 + x = (8 + x)(x + -3)

Reorder the terms:
-6 + x = (8 + x)(-3 + x)

Multiply (8 + x) * (-3 + x)
-6 + x = (8(-3 + x) + x(-3 + x))
-6 + x = ((-3 * 8 + x * 8) + x(-3 + x))
-6 + x = ((-24 + 8x) + x(-3 + x))
-6 + x = (-24 + 8x + (-3 * x + x * x))
-6 + x = (-24 + 8x + (-3x + x2))

Combine like terms: 8x + -3x = 5x
-6 + x = (-24 + 5x + x2)

Solving
-6 + x = -24 + 5x + x2

Solving for variable 'x'.

Reorder the terms:
-6 + 24 + x + -5x + -1x2 = -24 + 5x + x2 + 24 + -5x + -1x2

Combine like terms: -6 + 24 = 18
18 + x + -5x + -1x2 = -24 + 5x + x2 + 24 + -5x + -1x2

Combine like terms: x + -5x = -4x
18 + -4x + -1x2 = -24 + 5x + x2 + 24 + -5x + -1x2

Reorder the terms:
18 + -4x + -1x2 = -24 + 24 + 5x + -5x + x2 + -1x2

Combine like terms: -24 + 24 = 0
18 + -4x + -1x2 = 0 + 5x + -5x + x2 + -1x2
18 + -4x + -1x2 = 5x + -5x + x2 + -1x2

Combine like terms: 5x + -5x = 0
18 + -4x + -1x2 = 0 + x2 + -1x2
18 + -4x + -1x2 = x2 + -1x2

Combine like terms: x2 + -1x2 = 0
18 + -4x + -1x2 = 0

Begin completing the square.  Divide all terms by
-1 the coefficient of the squared term: 

Divide each side by '-1'.
-18 + 4x + x2 = 0

Move the constant term to the right:

Add '18' to each side of the equation.
-18 + 4x + 18 + x2 = 0 + 18

Reorder the terms:
-18 + 18 + 4x + x2 = 0 + 18

Combine like terms: -18 + 18 = 0
0 + 4x + x2 = 0 + 18
4x + x2 = 0 + 18

Combine like terms: 0 + 18 = 18
4x + x2 = 18

The x term is 4x.  Take half its coefficient (2).
Square it (4) and add it to both sides.

Add '4' to each side of the equation.
4x + 4 + x2 = 18 + 4

Reorder the terms:
4 + 4x + x2 = 18 + 4

Combine like terms: 18 + 4 = 22
4 + 4x + x2 = 22

Factor a perfect square on the left side:
(x + 2)(x + 2) = 22

Calculate the square root of the right side: 4.69041576

Break this problem into two subproblems by setting 
(x + 2) equal to 4.69041576 and -4.69041576.

Subproblem 1

x + 2 = 4.69041576 Simplifying x + 2 = 4.69041576 Reorder the terms: 2 + x = 4.69041576 Solving 2 + x = 4.69041576 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-2' to each side of the equation. 2 + -2 + x = 4.69041576 + -2 Combine like terms: 2 + -2 = 0 0 + x = 4.69041576 + -2 x = 4.69041576 + -2 Combine like terms: 4.69041576 + -2 = 2.69041576 x = 2.69041576 Simplifying x = 2.69041576

Subproblem 2

x + 2 = -4.69041576 Simplifying x + 2 = -4.69041576 Reorder the terms: 2 + x = -4.69041576 Solving 2 + x = -4.69041576 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-2' to each side of the equation. 2 + -2 + x = -4.69041576 + -2 Combine like terms: 2 + -2 = 0 0 + x = -4.69041576 + -2 x = -4.69041576 + -2 Combine like terms: -4.69041576 + -2 = -6.69041576 x = -6.69041576 Simplifying x = -6.69041576

Solution

The solution to the problem is based on the solutions from the subproblems. x = {2.69041576, -6.69041576}

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