3x^2+11x=2

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Solution for 3x^2+11x=2 equation:


Simplifying
3x2 + 11x = 2

Reorder the terms:
11x + 3x2 = 2

Solving
11x + 3x2 = 2

Solving for variable 'x'.

Reorder the terms:
-2 + 11x + 3x2 = 2 + -2

Combine like terms: 2 + -2 = 0
-2 + 11x + 3x2 = 0

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

Divide each side by '3'.
-0.6666666667 + 3.666666667x + x2 = 0

Move the constant term to the right:

Add '0.6666666667' to each side of the equation.
-0.6666666667 + 3.666666667x + 0.6666666667 + x2 = 0 + 0.6666666667

Reorder the terms:
-0.6666666667 + 0.6666666667 + 3.666666667x + x2 = 0 + 0.6666666667

Combine like terms: -0.6666666667 + 0.6666666667 = 0.0000000000
0.0000000000 + 3.666666667x + x2 = 0 + 0.6666666667
3.666666667x + x2 = 0 + 0.6666666667

Combine like terms: 0 + 0.6666666667 = 0.6666666667
3.666666667x + x2 = 0.6666666667

The x term is 3.666666667x.  Take half its coefficient (1.833333334).
Square it (3.361111114) and add it to both sides.

Add '3.361111114' to each side of the equation.
3.666666667x + 3.361111114 + x2 = 0.6666666667 + 3.361111114

Reorder the terms:
3.361111114 + 3.666666667x + x2 = 0.6666666667 + 3.361111114

Combine like terms: 0.6666666667 + 3.361111114 = 4.0277777807
3.361111114 + 3.666666667x + x2 = 4.0277777807

Factor a perfect square on the left side:
(x + 1.833333334)(x + 1.833333334) = 4.0277777807

Calculate the square root of the right side: 2.006932431

Break this problem into two subproblems by setting 
(x + 1.833333334) equal to 2.006932431 and -2.006932431.

Subproblem 1

x + 1.833333334 = 2.006932431 Simplifying x + 1.833333334 = 2.006932431 Reorder the terms: 1.833333334 + x = 2.006932431 Solving 1.833333334 + x = 2.006932431 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-1.833333334' to each side of the equation. 1.833333334 + -1.833333334 + x = 2.006932431 + -1.833333334 Combine like terms: 1.833333334 + -1.833333334 = 0.000000000 0.000000000 + x = 2.006932431 + -1.833333334 x = 2.006932431 + -1.833333334 Combine like terms: 2.006932431 + -1.833333334 = 0.173599097 x = 0.173599097 Simplifying x = 0.173599097

Subproblem 2

x + 1.833333334 = -2.006932431 Simplifying x + 1.833333334 = -2.006932431 Reorder the terms: 1.833333334 + x = -2.006932431 Solving 1.833333334 + x = -2.006932431 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-1.833333334' to each side of the equation. 1.833333334 + -1.833333334 + x = -2.006932431 + -1.833333334 Combine like terms: 1.833333334 + -1.833333334 = 0.000000000 0.000000000 + x = -2.006932431 + -1.833333334 x = -2.006932431 + -1.833333334 Combine like terms: -2.006932431 + -1.833333334 = -3.840265765 x = -3.840265765 Simplifying x = -3.840265765

Solution

The solution to the problem is based on the solutions from the subproblems. x = {0.173599097, -3.840265765}

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