x*(x-7)=2(x+x-7)

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Solution for x*(x-7)=2(x+x-7) equation:


Simplifying
x(x + -7) = 2(x + x + -7)

Reorder the terms:
x(-7 + x) = 2(x + x + -7)
(-7 * x + x * x) = 2(x + x + -7)
(-7x + x2) = 2(x + x + -7)

Reorder the terms:
-7x + x2 = 2(-7 + x + x)

Combine like terms: x + x = 2x
-7x + x2 = 2(-7 + 2x)
-7x + x2 = (-7 * 2 + 2x * 2)
-7x + x2 = (-14 + 4x)

Solving
-7x + x2 = -14 + 4x

Solving for variable 'x'.

Reorder the terms:
14 + -7x + -4x + x2 = -14 + 4x + 14 + -4x

Combine like terms: -7x + -4x = -11x
14 + -11x + x2 = -14 + 4x + 14 + -4x

Reorder the terms:
14 + -11x + x2 = -14 + 14 + 4x + -4x

Combine like terms: -14 + 14 = 0
14 + -11x + x2 = 0 + 4x + -4x
14 + -11x + x2 = 4x + -4x

Combine like terms: 4x + -4x = 0
14 + -11x + x2 = 0

Begin completing the square.

Move the constant term to the right:

Add '-14' to each side of the equation.
14 + -11x + -14 + x2 = 0 + -14

Reorder the terms:
14 + -14 + -11x + x2 = 0 + -14

Combine like terms: 14 + -14 = 0
0 + -11x + x2 = 0 + -14
-11x + x2 = 0 + -14

Combine like terms: 0 + -14 = -14
-11x + x2 = -14

The x term is -11x.  Take half its coefficient (-5.5).
Square it (30.25) and add it to both sides.

Add '30.25' to each side of the equation.
-11x + 30.25 + x2 = -14 + 30.25

Reorder the terms:
30.25 + -11x + x2 = -14 + 30.25

Combine like terms: -14 + 30.25 = 16.25
30.25 + -11x + x2 = 16.25

Factor a perfect square on the left side:
(x + -5.5)(x + -5.5) = 16.25

Calculate the square root of the right side: 4.031128874

Break this problem into two subproblems by setting 
(x + -5.5) equal to 4.031128874 and -4.031128874.

Subproblem 1

x + -5.5 = 4.031128874 Simplifying x + -5.5 = 4.031128874 Reorder the terms: -5.5 + x = 4.031128874 Solving -5.5 + x = 4.031128874 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '5.5' to each side of the equation. -5.5 + 5.5 + x = 4.031128874 + 5.5 Combine like terms: -5.5 + 5.5 = 0.0 0.0 + x = 4.031128874 + 5.5 x = 4.031128874 + 5.5 Combine like terms: 4.031128874 + 5.5 = 9.531128874 x = 9.531128874 Simplifying x = 9.531128874

Subproblem 2

x + -5.5 = -4.031128874 Simplifying x + -5.5 = -4.031128874 Reorder the terms: -5.5 + x = -4.031128874 Solving -5.5 + x = -4.031128874 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '5.5' to each side of the equation. -5.5 + 5.5 + x = -4.031128874 + 5.5 Combine like terms: -5.5 + 5.5 = 0.0 0.0 + x = -4.031128874 + 5.5 x = -4.031128874 + 5.5 Combine like terms: -4.031128874 + 5.5 = 1.468871126 x = 1.468871126 Simplifying x = 1.468871126

Solution

The solution to the problem is based on the solutions from the subproblems. x = {9.531128874, 1.468871126}

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