3x-3+3x=x^2-x

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Solution for 3x-3+3x=x^2-x equation:


Simplifying
3x + -3 + 3x = x2 + -1x

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

Combine like terms: 3x + 3x = 6x
-3 + 6x = x2 + -1x

Reorder the terms:
-3 + 6x = -1x + x2

Solving
-3 + 6x = -1x + x2

Solving for variable 'x'.

Combine like terms: 6x + x = 7x
-3 + 7x + -1x2 = -1x + x2 + x + -1x2

Reorder the terms:
-3 + 7x + -1x2 = -1x + x + x2 + -1x2

Combine like terms: -1x + x = 0
-3 + 7x + -1x2 = 0 + x2 + -1x2
-3 + 7x + -1x2 = x2 + -1x2

Combine like terms: x2 + -1x2 = 0
-3 + 7x + -1x2 = 0

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

Divide each side by '-1'.
3 + -7x + x2 = 0

Move the constant term to the right:

Add '-3' to each side of the equation.
3 + -7x + -3 + x2 = 0 + -3

Reorder the terms:
3 + -3 + -7x + x2 = 0 + -3

Combine like terms: 3 + -3 = 0
0 + -7x + x2 = 0 + -3
-7x + x2 = 0 + -3

Combine like terms: 0 + -3 = -3
-7x + x2 = -3

The x term is -7x.  Take half its coefficient (-3.5).
Square it (12.25) and add it to both sides.

Add '12.25' to each side of the equation.
-7x + 12.25 + x2 = -3 + 12.25

Reorder the terms:
12.25 + -7x + x2 = -3 + 12.25

Combine like terms: -3 + 12.25 = 9.25
12.25 + -7x + x2 = 9.25

Factor a perfect square on the left side:
(x + -3.5)(x + -3.5) = 9.25

Calculate the square root of the right side: 3.041381265

Break this problem into two subproblems by setting 
(x + -3.5) equal to 3.041381265 and -3.041381265.

Subproblem 1

x + -3.5 = 3.041381265 Simplifying x + -3.5 = 3.041381265 Reorder the terms: -3.5 + x = 3.041381265 Solving -3.5 + x = 3.041381265 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '3.5' to each side of the equation. -3.5 + 3.5 + x = 3.041381265 + 3.5 Combine like terms: -3.5 + 3.5 = 0.0 0.0 + x = 3.041381265 + 3.5 x = 3.041381265 + 3.5 Combine like terms: 3.041381265 + 3.5 = 6.541381265 x = 6.541381265 Simplifying x = 6.541381265

Subproblem 2

x + -3.5 = -3.041381265 Simplifying x + -3.5 = -3.041381265 Reorder the terms: -3.5 + x = -3.041381265 Solving -3.5 + x = -3.041381265 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '3.5' to each side of the equation. -3.5 + 3.5 + x = -3.041381265 + 3.5 Combine like terms: -3.5 + 3.5 = 0.0 0.0 + x = -3.041381265 + 3.5 x = -3.041381265 + 3.5 Combine like terms: -3.041381265 + 3.5 = 0.458618735 x = 0.458618735 Simplifying x = 0.458618735

Solution

The solution to the problem is based on the solutions from the subproblems. x = {6.541381265, 0.458618735}

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