3x^2+2x=333

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Solution for 3x^2+2x=333 equation:


Simplifying
3x2 + 2x = 333

Reorder the terms:
2x + 3x2 = 333

Solving
2x + 3x2 = 333

Solving for variable 'x'.

Reorder the terms:
-333 + 2x + 3x2 = 333 + -333

Combine like terms: 333 + -333 = 0
-333 + 2x + 3x2 = 0

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

Divide each side by '3'.
-111 + 0.6666666667x + x2 = 0

Move the constant term to the right:

Add '111' to each side of the equation.
-111 + 0.6666666667x + 111 + x2 = 0 + 111

Reorder the terms:
-111 + 111 + 0.6666666667x + x2 = 0 + 111

Combine like terms: -111 + 111 = 0
0 + 0.6666666667x + x2 = 0 + 111
0.6666666667x + x2 = 0 + 111

Combine like terms: 0 + 111 = 111
0.6666666667x + x2 = 111

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 = 111 + 0.1111111112

Reorder the terms:
0.1111111112 + 0.6666666667x + x2 = 111 + 0.1111111112

Combine like terms: 111 + 0.1111111112 = 111.1111111112
0.1111111112 + 0.6666666667x + x2 = 111.1111111112

Factor a perfect square on the left side:
(x + 0.3333333334)(x + 0.3333333334) = 111.1111111112

Calculate the square root of the right side: 10.540925534

Break this problem into two subproblems by setting 
(x + 0.3333333334) equal to 10.540925534 and -10.540925534.

Subproblem 1

x + 0.3333333334 = 10.540925534 Simplifying x + 0.3333333334 = 10.540925534 Reorder the terms: 0.3333333334 + x = 10.540925534 Solving 0.3333333334 + x = 10.540925534 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 = 10.540925534 + -0.3333333334 Combine like terms: 0.3333333334 + -0.3333333334 = 0.0000000000 0.0000000000 + x = 10.540925534 + -0.3333333334 x = 10.540925534 + -0.3333333334 Combine like terms: 10.540925534 + -0.3333333334 = 10.2075922006 x = 10.2075922006 Simplifying x = 10.2075922006

Subproblem 2

x + 0.3333333334 = -10.540925534 Simplifying x + 0.3333333334 = -10.540925534 Reorder the terms: 0.3333333334 + x = -10.540925534 Solving 0.3333333334 + x = -10.540925534 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 = -10.540925534 + -0.3333333334 Combine like terms: 0.3333333334 + -0.3333333334 = 0.0000000000 0.0000000000 + x = -10.540925534 + -0.3333333334 x = -10.540925534 + -0.3333333334 Combine like terms: -10.540925534 + -0.3333333334 = -10.8742588674 x = -10.8742588674 Simplifying x = -10.8742588674

Solution

The solution to the problem is based on the solutions from the subproblems. x = {10.2075922006, -10.8742588674}

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