6x(2x-5)=2x+11

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Solution for 6x(2x-5)=2x+11 equation:


Simplifying
6x(2x + -5) = 2x + 11

Reorder the terms:
6x(-5 + 2x) = 2x + 11
(-5 * 6x + 2x * 6x) = 2x + 11
(-30x + 12x2) = 2x + 11

Reorder the terms:
-30x + 12x2 = 11 + 2x

Solving
-30x + 12x2 = 11 + 2x

Solving for variable 'x'.

Reorder the terms:
-11 + -30x + -2x + 12x2 = 11 + 2x + -11 + -2x

Combine like terms: -30x + -2x = -32x
-11 + -32x + 12x2 = 11 + 2x + -11 + -2x

Reorder the terms:
-11 + -32x + 12x2 = 11 + -11 + 2x + -2x

Combine like terms: 11 + -11 = 0
-11 + -32x + 12x2 = 0 + 2x + -2x
-11 + -32x + 12x2 = 2x + -2x

Combine like terms: 2x + -2x = 0
-11 + -32x + 12x2 = 0

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

Divide each side by '12'.
-0.9166666667 + -2.666666667x + x2 = 0

Move the constant term to the right:

Add '0.9166666667' to each side of the equation.
-0.9166666667 + -2.666666667x + 0.9166666667 + x2 = 0 + 0.9166666667

Reorder the terms:
-0.9166666667 + 0.9166666667 + -2.666666667x + x2 = 0 + 0.9166666667

Combine like terms: -0.9166666667 + 0.9166666667 = 0.0000000000
0.0000000000 + -2.666666667x + x2 = 0 + 0.9166666667
-2.666666667x + x2 = 0 + 0.9166666667

Combine like terms: 0 + 0.9166666667 = 0.9166666667
-2.666666667x + x2 = 0.9166666667

The x term is -2.666666667x.  Take half its coefficient (-1.333333334).
Square it (1.777777780) and add it to both sides.

Add '1.777777780' to each side of the equation.
-2.666666667x + 1.777777780 + x2 = 0.9166666667 + 1.777777780

Reorder the terms:
1.777777780 + -2.666666667x + x2 = 0.9166666667 + 1.777777780

Combine like terms: 0.9166666667 + 1.777777780 = 2.6944444467
1.777777780 + -2.666666667x + x2 = 2.6944444467

Factor a perfect square on the left side:
(x + -1.333333334)(x + -1.333333334) = 2.6944444467

Calculate the square root of the right side: 1.641476301

Break this problem into two subproblems by setting 
(x + -1.333333334) equal to 1.641476301 and -1.641476301.

Subproblem 1

x + -1.333333334 = 1.641476301 Simplifying x + -1.333333334 = 1.641476301 Reorder the terms: -1.333333334 + x = 1.641476301 Solving -1.333333334 + x = 1.641476301 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '1.333333334' to each side of the equation. -1.333333334 + 1.333333334 + x = 1.641476301 + 1.333333334 Combine like terms: -1.333333334 + 1.333333334 = 0.000000000 0.000000000 + x = 1.641476301 + 1.333333334 x = 1.641476301 + 1.333333334 Combine like terms: 1.641476301 + 1.333333334 = 2.974809635 x = 2.974809635 Simplifying x = 2.974809635

Subproblem 2

x + -1.333333334 = -1.641476301 Simplifying x + -1.333333334 = -1.641476301 Reorder the terms: -1.333333334 + x = -1.641476301 Solving -1.333333334 + x = -1.641476301 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '1.333333334' to each side of the equation. -1.333333334 + 1.333333334 + x = -1.641476301 + 1.333333334 Combine like terms: -1.333333334 + 1.333333334 = 0.000000000 0.000000000 + x = -1.641476301 + 1.333333334 x = -1.641476301 + 1.333333334 Combine like terms: -1.641476301 + 1.333333334 = -0.308142967 x = -0.308142967 Simplifying x = -0.308142967

Solution

The solution to the problem is based on the solutions from the subproblems. x = {2.974809635, -0.308142967}

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