(3x)(3x)-3x-5=0

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Solution for (3x)(3x)-3x-5=0 equation:


Simplifying
(3x)(3x) + -3x + -5 = 0

Remove parenthesis around (3x)
3x(3x) + -3x + -5 = 0

Remove parenthesis around (3x)
3x * 3x + -3x + -5 = 0

Reorder the terms for easier multiplication:
3 * 3x * x + -3x + -5 = 0

Multiply 3 * 3
9x * x + -3x + -5 = 0

Multiply x * x
9x2 + -3x + -5 = 0

Reorder the terms:
-5 + -3x + 9x2 = 0

Solving
-5 + -3x + 9x2 = 0

Solving for variable 'x'.

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

Divide each side by '9'.
-0.5555555556 + -0.3333333333x + x2 = 0

Move the constant term to the right:

Add '0.5555555556' to each side of the equation.
-0.5555555556 + -0.3333333333x + 0.5555555556 + x2 = 0 + 0.5555555556

Reorder the terms:
-0.5555555556 + 0.5555555556 + -0.3333333333x + x2 = 0 + 0.5555555556

Combine like terms: -0.5555555556 + 0.5555555556 = 0.0000000000
0.0000000000 + -0.3333333333x + x2 = 0 + 0.5555555556
-0.3333333333x + x2 = 0 + 0.5555555556

Combine like terms: 0 + 0.5555555556 = 0.5555555556
-0.3333333333x + x2 = 0.5555555556

The x term is -0.3333333333x.  Take half its coefficient (-0.1666666667).
Square it (0.02777777779) and add it to both sides.

Add '0.02777777779' to each side of the equation.
-0.3333333333x + 0.02777777779 + x2 = 0.5555555556 + 0.02777777779

Reorder the terms:
0.02777777779 + -0.3333333333x + x2 = 0.5555555556 + 0.02777777779

Combine like terms: 0.5555555556 + 0.02777777779 = 0.58333333339
0.02777777779 + -0.3333333333x + x2 = 0.58333333339

Factor a perfect square on the left side:
(x + -0.1666666667)(x + -0.1666666667) = 0.58333333339

Calculate the square root of the right side: 0.763762616

Break this problem into two subproblems by setting 
(x + -0.1666666667) equal to 0.763762616 and -0.763762616.

Subproblem 1

x + -0.1666666667 = 0.763762616 Simplifying x + -0.1666666667 = 0.763762616 Reorder the terms: -0.1666666667 + x = 0.763762616 Solving -0.1666666667 + x = 0.763762616 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '0.1666666667' to each side of the equation. -0.1666666667 + 0.1666666667 + x = 0.763762616 + 0.1666666667 Combine like terms: -0.1666666667 + 0.1666666667 = 0.0000000000 0.0000000000 + x = 0.763762616 + 0.1666666667 x = 0.763762616 + 0.1666666667 Combine like terms: 0.763762616 + 0.1666666667 = 0.9304292827 x = 0.9304292827 Simplifying x = 0.9304292827

Subproblem 2

x + -0.1666666667 = -0.763762616 Simplifying x + -0.1666666667 = -0.763762616 Reorder the terms: -0.1666666667 + x = -0.763762616 Solving -0.1666666667 + x = -0.763762616 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '0.1666666667' to each side of the equation. -0.1666666667 + 0.1666666667 + x = -0.763762616 + 0.1666666667 Combine like terms: -0.1666666667 + 0.1666666667 = 0.0000000000 0.0000000000 + x = -0.763762616 + 0.1666666667 x = -0.763762616 + 0.1666666667 Combine like terms: -0.763762616 + 0.1666666667 = -0.5970959493 x = -0.5970959493 Simplifying x = -0.5970959493

Solution

The solution to the problem is based on the solutions from the subproblems. x = {0.9304292827, -0.5970959493}

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