3x-[5x(9x+3)-11]=0

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Solution for 3x-[5x(9x+3)-11]=0 equation:


Simplifying
3x + -1[5x(9x + 3) + -11] = 0

Reorder the terms:
3x + -1[5x(3 + 9x) + -11] = 0
3x + -1[(3 * 5x + 9x * 5x) + -11] = 0
3x + -1[(15x + 45x2) + -11] = 0

Reorder the terms:
3x + -1[-11 + 15x + 45x2] = 0
3x + [-11 * -1 + 15x * -1 + 45x2 * -1] = 0
3x + [11 + -15x + -45x2] = 0

Reorder the terms:
11 + 3x + -15x + -45x2 = 0

Combine like terms: 3x + -15x = -12x
11 + -12x + -45x2 = 0

Solving
11 + -12x + -45x2 = 0

Solving for variable 'x'.

Begin completing the square.  Divide all terms by
-45 the coefficient of the squared term: 

Divide each side by '-45'.
-0.2444444444 + 0.2666666667x + x2 = 0

Move the constant term to the right:

Add '0.2444444444' to each side of the equation.
-0.2444444444 + 0.2666666667x + 0.2444444444 + x2 = 0 + 0.2444444444

Reorder the terms:
-0.2444444444 + 0.2444444444 + 0.2666666667x + x2 = 0 + 0.2444444444

Combine like terms: -0.2444444444 + 0.2444444444 = 0.0000000000
0.0000000000 + 0.2666666667x + x2 = 0 + 0.2444444444
0.2666666667x + x2 = 0 + 0.2444444444

Combine like terms: 0 + 0.2444444444 = 0.2444444444
0.2666666667x + x2 = 0.2444444444

The x term is 0.2666666667x.  Take half its coefficient (0.1333333334).
Square it (0.01777777780) and add it to both sides.

Add '0.01777777780' to each side of the equation.
0.2666666667x + 0.01777777780 + x2 = 0.2444444444 + 0.01777777780

Reorder the terms:
0.01777777780 + 0.2666666667x + x2 = 0.2444444444 + 0.01777777780

Combine like terms: 0.2444444444 + 0.01777777780 = 0.2622222222
0.01777777780 + 0.2666666667x + x2 = 0.2622222222

Factor a perfect square on the left side:
(x + 0.1333333334)(x + 0.1333333334) = 0.2622222222

Calculate the square root of the right side: 0.512076383

Break this problem into two subproblems by setting 
(x + 0.1333333334) equal to 0.512076383 and -0.512076383.

Subproblem 1

x + 0.1333333334 = 0.512076383 Simplifying x + 0.1333333334 = 0.512076383 Reorder the terms: 0.1333333334 + x = 0.512076383 Solving 0.1333333334 + x = 0.512076383 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.1333333334' to each side of the equation. 0.1333333334 + -0.1333333334 + x = 0.512076383 + -0.1333333334 Combine like terms: 0.1333333334 + -0.1333333334 = 0.0000000000 0.0000000000 + x = 0.512076383 + -0.1333333334 x = 0.512076383 + -0.1333333334 Combine like terms: 0.512076383 + -0.1333333334 = 0.3787430496 x = 0.3787430496 Simplifying x = 0.3787430496

Subproblem 2

x + 0.1333333334 = -0.512076383 Simplifying x + 0.1333333334 = -0.512076383 Reorder the terms: 0.1333333334 + x = -0.512076383 Solving 0.1333333334 + x = -0.512076383 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.1333333334' to each side of the equation. 0.1333333334 + -0.1333333334 + x = -0.512076383 + -0.1333333334 Combine like terms: 0.1333333334 + -0.1333333334 = 0.0000000000 0.0000000000 + x = -0.512076383 + -0.1333333334 x = -0.512076383 + -0.1333333334 Combine like terms: -0.512076383 + -0.1333333334 = -0.6454097164 x = -0.6454097164 Simplifying x = -0.6454097164

Solution

The solution to the problem is based on the solutions from the subproblems. x = {0.3787430496, -0.6454097164}

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