(2x+8)(x-6)+3(x-2)=0

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Solution for (2x+8)(x-6)+3(x-2)=0 equation:


Simplifying
(2x + 8)(x + -6) + 3(x + -2) = 0

Reorder the terms:
(8 + 2x)(x + -6) + 3(x + -2) = 0

Reorder the terms:
(8 + 2x)(-6 + x) + 3(x + -2) = 0

Multiply (8 + 2x) * (-6 + x)
(8(-6 + x) + 2x * (-6 + x)) + 3(x + -2) = 0
((-6 * 8 + x * 8) + 2x * (-6 + x)) + 3(x + -2) = 0
((-48 + 8x) + 2x * (-6 + x)) + 3(x + -2) = 0
(-48 + 8x + (-6 * 2x + x * 2x)) + 3(x + -2) = 0
(-48 + 8x + (-12x + 2x2)) + 3(x + -2) = 0

Combine like terms: 8x + -12x = -4x
(-48 + -4x + 2x2) + 3(x + -2) = 0

Reorder the terms:
-48 + -4x + 2x2 + 3(-2 + x) = 0
-48 + -4x + 2x2 + (-2 * 3 + x * 3) = 0
-48 + -4x + 2x2 + (-6 + 3x) = 0

Reorder the terms:
-48 + -6 + -4x + 3x + 2x2 = 0

Combine like terms: -48 + -6 = -54
-54 + -4x + 3x + 2x2 = 0

Combine like terms: -4x + 3x = -1x
-54 + -1x + 2x2 = 0

Solving
-54 + -1x + 2x2 = 0

Solving for variable 'x'.

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

Divide each side by '2'.
-27 + -0.5x + x2 = 0

Move the constant term to the right:

Add '27' to each side of the equation.
-27 + -0.5x + 27 + x2 = 0 + 27

Reorder the terms:
-27 + 27 + -0.5x + x2 = 0 + 27

Combine like terms: -27 + 27 = 0
0 + -0.5x + x2 = 0 + 27
-0.5x + x2 = 0 + 27

Combine like terms: 0 + 27 = 27
-0.5x + x2 = 27

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 = 27 + 0.0625

Reorder the terms:
0.0625 + -0.5x + x2 = 27 + 0.0625

Combine like terms: 27 + 0.0625 = 27.0625
0.0625 + -0.5x + x2 = 27.0625

Factor a perfect square on the left side:
(x + -0.25)(x + -0.25) = 27.0625

Calculate the square root of the right side: 5.202163012

Break this problem into two subproblems by setting 
(x + -0.25) equal to 5.202163012 and -5.202163012.

Subproblem 1

x + -0.25 = 5.202163012 Simplifying x + -0.25 = 5.202163012 Reorder the terms: -0.25 + x = 5.202163012 Solving -0.25 + x = 5.202163012 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 = 5.202163012 + 0.25 Combine like terms: -0.25 + 0.25 = 0.00 0.00 + x = 5.202163012 + 0.25 x = 5.202163012 + 0.25 Combine like terms: 5.202163012 + 0.25 = 5.452163012 x = 5.452163012 Simplifying x = 5.452163012

Subproblem 2

x + -0.25 = -5.202163012 Simplifying x + -0.25 = -5.202163012 Reorder the terms: -0.25 + x = -5.202163012 Solving -0.25 + x = -5.202163012 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 = -5.202163012 + 0.25 Combine like terms: -0.25 + 0.25 = 0.00 0.00 + x = -5.202163012 + 0.25 x = -5.202163012 + 0.25 Combine like terms: -5.202163012 + 0.25 = -4.952163012 x = -4.952163012 Simplifying x = -4.952163012

Solution

The solution to the problem is based on the solutions from the subproblems. x = {5.452163012, -4.952163012}

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