9(4x+2)x=5

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Solution for 9(4x+2)x=5 equation:


Simplifying
9(4x + 2) * x = 5

Reorder the terms:
9(2 + 4x) * x = 5

Reorder the terms for easier multiplication:
9x(2 + 4x) = 5
(2 * 9x + 4x * 9x) = 5
(18x + 36x2) = 5

Solving
18x + 36x2 = 5

Solving for variable 'x'.

Reorder the terms:
-5 + 18x + 36x2 = 5 + -5

Combine like terms: 5 + -5 = 0
-5 + 18x + 36x2 = 0

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

Divide each side by '36'.
-0.1388888889 + 0.5x + x2 = 0

Move the constant term to the right:

Add '0.1388888889' to each side of the equation.
-0.1388888889 + 0.5x + 0.1388888889 + x2 = 0 + 0.1388888889

Reorder the terms:
-0.1388888889 + 0.1388888889 + 0.5x + x2 = 0 + 0.1388888889

Combine like terms: -0.1388888889 + 0.1388888889 = 0.0000000000
0.0000000000 + 0.5x + x2 = 0 + 0.1388888889
0.5x + x2 = 0 + 0.1388888889

Combine like terms: 0 + 0.1388888889 = 0.1388888889
0.5x + x2 = 0.1388888889

The x term is 0.5x.  Take half its coefficient (0.25).
Square it (0.0625) and add it to both sides.

Add '0.0625' to each side of the equation.
0.5x + 0.0625 + x2 = 0.1388888889 + 0.0625

Reorder the terms:
0.0625 + 0.5x + x2 = 0.1388888889 + 0.0625

Combine like terms: 0.1388888889 + 0.0625 = 0.2013888889
0.0625 + 0.5x + x2 = 0.2013888889

Factor a perfect square on the left side:
(x + 0.25)(x + 0.25) = 0.2013888889

Calculate the square root of the right side: 0.448763734

Break this problem into two subproblems by setting 
(x + 0.25) equal to 0.448763734 and -0.448763734.

Subproblem 1

x + 0.25 = 0.448763734 Simplifying x + 0.25 = 0.448763734 Reorder the terms: 0.25 + x = 0.448763734 Solving 0.25 + x = 0.448763734 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.25' to each side of the equation. 0.25 + -0.25 + x = 0.448763734 + -0.25 Combine like terms: 0.25 + -0.25 = 0.00 0.00 + x = 0.448763734 + -0.25 x = 0.448763734 + -0.25 Combine like terms: 0.448763734 + -0.25 = 0.198763734 x = 0.198763734 Simplifying x = 0.198763734

Subproblem 2

x + 0.25 = -0.448763734 Simplifying x + 0.25 = -0.448763734 Reorder the terms: 0.25 + x = -0.448763734 Solving 0.25 + x = -0.448763734 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.25' to each side of the equation. 0.25 + -0.25 + x = -0.448763734 + -0.25 Combine like terms: 0.25 + -0.25 = 0.00 0.00 + x = -0.448763734 + -0.25 x = -0.448763734 + -0.25 Combine like terms: -0.448763734 + -0.25 = -0.698763734 x = -0.698763734 Simplifying x = -0.698763734

Solution

The solution to the problem is based on the solutions from the subproblems. x = {0.198763734, -0.698763734}

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