9x^2+6x=2

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Solution for 9x^2+6x=2 equation:


Simplifying
9x2 + 6x = 2

Reorder the terms:
6x + 9x2 = 2

Solving
6x + 9x2 = 2

Solving for variable 'x'.

Reorder the terms:
-2 + 6x + 9x2 = 2 + -2

Combine like terms: 2 + -2 = 0
-2 + 6x + 9x2 = 0

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

Divide each side by '9'.
-0.2222222222 + 0.6666666667x + x2 = 0

Move the constant term to the right:

Add '0.2222222222' to each side of the equation.
-0.2222222222 + 0.6666666667x + 0.2222222222 + x2 = 0 + 0.2222222222

Reorder the terms:
-0.2222222222 + 0.2222222222 + 0.6666666667x + x2 = 0 + 0.2222222222

Combine like terms: -0.2222222222 + 0.2222222222 = 0.0000000000
0.0000000000 + 0.6666666667x + x2 = 0 + 0.2222222222
0.6666666667x + x2 = 0 + 0.2222222222

Combine like terms: 0 + 0.2222222222 = 0.2222222222
0.6666666667x + x2 = 0.2222222222

The x term is 0.6666666667x.  Take half its coefficient (0.3333333334).
Square it (0.1111111112) and add it to both sides.

Add '0.1111111112' to each side of the equation.
0.6666666667x + 0.1111111112 + x2 = 0.2222222222 + 0.1111111112

Reorder the terms:
0.1111111112 + 0.6666666667x + x2 = 0.2222222222 + 0.1111111112

Combine like terms: 0.2222222222 + 0.1111111112 = 0.3333333334
0.1111111112 + 0.6666666667x + x2 = 0.3333333334

Factor a perfect square on the left side:
(x + 0.3333333334)(x + 0.3333333334) = 0.3333333334

Calculate the square root of the right side: 0.577350269

Break this problem into two subproblems by setting 
(x + 0.3333333334) equal to 0.577350269 and -0.577350269.

Subproblem 1

x + 0.3333333334 = 0.577350269 Simplifying x + 0.3333333334 = 0.577350269 Reorder the terms: 0.3333333334 + x = 0.577350269 Solving 0.3333333334 + x = 0.577350269 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.3333333334' to each side of the equation. 0.3333333334 + -0.3333333334 + x = 0.577350269 + -0.3333333334 Combine like terms: 0.3333333334 + -0.3333333334 = 0.0000000000 0.0000000000 + x = 0.577350269 + -0.3333333334 x = 0.577350269 + -0.3333333334 Combine like terms: 0.577350269 + -0.3333333334 = 0.2440169356 x = 0.2440169356 Simplifying x = 0.2440169356

Subproblem 2

x + 0.3333333334 = -0.577350269 Simplifying x + 0.3333333334 = -0.577350269 Reorder the terms: 0.3333333334 + x = -0.577350269 Solving 0.3333333334 + x = -0.577350269 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.3333333334' to each side of the equation. 0.3333333334 + -0.3333333334 + x = -0.577350269 + -0.3333333334 Combine like terms: 0.3333333334 + -0.3333333334 = 0.0000000000 0.0000000000 + x = -0.577350269 + -0.3333333334 x = -0.577350269 + -0.3333333334 Combine like terms: -0.577350269 + -0.3333333334 = -0.9106836024 x = -0.9106836024 Simplifying x = -0.9106836024

Solution

The solution to the problem is based on the solutions from the subproblems. x = {0.2440169356, -0.9106836024}

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