3x(x-5)=5x+1

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Solution for 3x(x-5)=5x+1 equation:


Simplifying
3x(x + -5) = 5x + 1

Reorder the terms:
3x(-5 + x) = 5x + 1
(-5 * 3x + x * 3x) = 5x + 1
(-15x + 3x2) = 5x + 1

Reorder the terms:
-15x + 3x2 = 1 + 5x

Solving
-15x + 3x2 = 1 + 5x

Solving for variable 'x'.

Reorder the terms:
-1 + -15x + -5x + 3x2 = 1 + 5x + -1 + -5x

Combine like terms: -15x + -5x = -20x
-1 + -20x + 3x2 = 1 + 5x + -1 + -5x

Reorder the terms:
-1 + -20x + 3x2 = 1 + -1 + 5x + -5x

Combine like terms: 1 + -1 = 0
-1 + -20x + 3x2 = 0 + 5x + -5x
-1 + -20x + 3x2 = 5x + -5x

Combine like terms: 5x + -5x = 0
-1 + -20x + 3x2 = 0

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

Divide each side by '3'.
-0.3333333333 + -6.666666667x + x2 = 0

Move the constant term to the right:

Add '0.3333333333' to each side of the equation.
-0.3333333333 + -6.666666667x + 0.3333333333 + x2 = 0 + 0.3333333333

Reorder the terms:
-0.3333333333 + 0.3333333333 + -6.666666667x + x2 = 0 + 0.3333333333

Combine like terms: -0.3333333333 + 0.3333333333 = 0.0000000000
0.0000000000 + -6.666666667x + x2 = 0 + 0.3333333333
-6.666666667x + x2 = 0 + 0.3333333333

Combine like terms: 0 + 0.3333333333 = 0.3333333333
-6.666666667x + x2 = 0.3333333333

The x term is -6.666666667x.  Take half its coefficient (-3.333333334).
Square it (11.11111112) and add it to both sides.

Add '11.11111112' to each side of the equation.
-6.666666667x + 11.11111112 + x2 = 0.3333333333 + 11.11111112

Reorder the terms:
11.11111112 + -6.666666667x + x2 = 0.3333333333 + 11.11111112

Combine like terms: 0.3333333333 + 11.11111112 = 11.4444444533
11.11111112 + -6.666666667x + x2 = 11.4444444533

Factor a perfect square on the left side:
(x + -3.333333334)(x + -3.333333334) = 11.4444444533

Calculate the square root of the right side: 3.382963856

Break this problem into two subproblems by setting 
(x + -3.333333334) equal to 3.382963856 and -3.382963856.

Subproblem 1

x + -3.333333334 = 3.382963856 Simplifying x + -3.333333334 = 3.382963856 Reorder the terms: -3.333333334 + x = 3.382963856 Solving -3.333333334 + x = 3.382963856 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '3.333333334' to each side of the equation. -3.333333334 + 3.333333334 + x = 3.382963856 + 3.333333334 Combine like terms: -3.333333334 + 3.333333334 = 0.000000000 0.000000000 + x = 3.382963856 + 3.333333334 x = 3.382963856 + 3.333333334 Combine like terms: 3.382963856 + 3.333333334 = 6.71629719 x = 6.71629719 Simplifying x = 6.71629719

Subproblem 2

x + -3.333333334 = -3.382963856 Simplifying x + -3.333333334 = -3.382963856 Reorder the terms: -3.333333334 + x = -3.382963856 Solving -3.333333334 + x = -3.382963856 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '3.333333334' to each side of the equation. -3.333333334 + 3.333333334 + x = -3.382963856 + 3.333333334 Combine like terms: -3.333333334 + 3.333333334 = 0.000000000 0.000000000 + x = -3.382963856 + 3.333333334 x = -3.382963856 + 3.333333334 Combine like terms: -3.382963856 + 3.333333334 = -0.049630522 x = -0.049630522 Simplifying x = -0.049630522

Solution

The solution to the problem is based on the solutions from the subproblems. x = {6.71629719, -0.049630522}

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