2x(x-8)=(x+9)(x-6)

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Solution for 2x(x-8)=(x+9)(x-6) equation:


Simplifying
2x(x + -8) = (x + 9)(x + -6)

Reorder the terms:
2x(-8 + x) = (x + 9)(x + -6)
(-8 * 2x + x * 2x) = (x + 9)(x + -6)
(-16x + 2x2) = (x + 9)(x + -6)

Reorder the terms:
-16x + 2x2 = (9 + x)(x + -6)

Reorder the terms:
-16x + 2x2 = (9 + x)(-6 + x)

Multiply (9 + x) * (-6 + x)
-16x + 2x2 = (9(-6 + x) + x(-6 + x))
-16x + 2x2 = ((-6 * 9 + x * 9) + x(-6 + x))
-16x + 2x2 = ((-54 + 9x) + x(-6 + x))
-16x + 2x2 = (-54 + 9x + (-6 * x + x * x))
-16x + 2x2 = (-54 + 9x + (-6x + x2))

Combine like terms: 9x + -6x = 3x
-16x + 2x2 = (-54 + 3x + x2)

Solving
-16x + 2x2 = -54 + 3x + x2

Solving for variable 'x'.

Reorder the terms:
54 + -16x + -3x + 2x2 + -1x2 = -54 + 3x + x2 + 54 + -3x + -1x2

Combine like terms: -16x + -3x = -19x
54 + -19x + 2x2 + -1x2 = -54 + 3x + x2 + 54 + -3x + -1x2

Combine like terms: 2x2 + -1x2 = 1x2
54 + -19x + 1x2 = -54 + 3x + x2 + 54 + -3x + -1x2

Reorder the terms:
54 + -19x + 1x2 = -54 + 54 + 3x + -3x + x2 + -1x2

Combine like terms: -54 + 54 = 0
54 + -19x + 1x2 = 0 + 3x + -3x + x2 + -1x2
54 + -19x + 1x2 = 3x + -3x + x2 + -1x2

Combine like terms: 3x + -3x = 0
54 + -19x + 1x2 = 0 + x2 + -1x2
54 + -19x + 1x2 = x2 + -1x2

Combine like terms: x2 + -1x2 = 0
54 + -19x + 1x2 = 0

Begin completing the square.

Move the constant term to the right:

Add '-54' to each side of the equation.
54 + -19x + -54 + x2 = 0 + -54

Reorder the terms:
54 + -54 + -19x + x2 = 0 + -54

Combine like terms: 54 + -54 = 0
0 + -19x + x2 = 0 + -54
-19x + x2 = 0 + -54

Combine like terms: 0 + -54 = -54
-19x + x2 = -54

The x term is -19x.  Take half its coefficient (-9.5).
Square it (90.25) and add it to both sides.

Add '90.25' to each side of the equation.
-19x + 90.25 + x2 = -54 + 90.25

Reorder the terms:
90.25 + -19x + x2 = -54 + 90.25

Combine like terms: -54 + 90.25 = 36.25
90.25 + -19x + x2 = 36.25

Factor a perfect square on the left side:
(x + -9.5)(x + -9.5) = 36.25

Calculate the square root of the right side: 6.020797289

Break this problem into two subproblems by setting 
(x + -9.5) equal to 6.020797289 and -6.020797289.

Subproblem 1

x + -9.5 = 6.020797289 Simplifying x + -9.5 = 6.020797289 Reorder the terms: -9.5 + x = 6.020797289 Solving -9.5 + x = 6.020797289 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '9.5' to each side of the equation. -9.5 + 9.5 + x = 6.020797289 + 9.5 Combine like terms: -9.5 + 9.5 = 0.0 0.0 + x = 6.020797289 + 9.5 x = 6.020797289 + 9.5 Combine like terms: 6.020797289 + 9.5 = 15.520797289 x = 15.520797289 Simplifying x = 15.520797289

Subproblem 2

x + -9.5 = -6.020797289 Simplifying x + -9.5 = -6.020797289 Reorder the terms: -9.5 + x = -6.020797289 Solving -9.5 + x = -6.020797289 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '9.5' to each side of the equation. -9.5 + 9.5 + x = -6.020797289 + 9.5 Combine like terms: -9.5 + 9.5 = 0.0 0.0 + x = -6.020797289 + 9.5 x = -6.020797289 + 9.5 Combine like terms: -6.020797289 + 9.5 = 3.479202711 x = 3.479202711 Simplifying x = 3.479202711

Solution

The solution to the problem is based on the solutions from the subproblems. x = {15.520797289, 3.479202711}

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