18x^2-33x=4

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Solution for 18x^2-33x=4 equation:


Simplifying
18x2 + -33x = 4

Reorder the terms:
-33x + 18x2 = 4

Solving
-33x + 18x2 = 4

Solving for variable 'x'.

Reorder the terms:
-4 + -33x + 18x2 = 4 + -4

Combine like terms: 4 + -4 = 0
-4 + -33x + 18x2 = 0

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

Divide each side by '18'.
-0.2222222222 + -1.833333333x + x2 = 0

Move the constant term to the right:

Add '0.2222222222' to each side of the equation.
-0.2222222222 + -1.833333333x + 0.2222222222 + x2 = 0 + 0.2222222222

Reorder the terms:
-0.2222222222 + 0.2222222222 + -1.833333333x + x2 = 0 + 0.2222222222

Combine like terms: -0.2222222222 + 0.2222222222 = 0.0000000000
0.0000000000 + -1.833333333x + x2 = 0 + 0.2222222222
-1.833333333x + x2 = 0 + 0.2222222222

Combine like terms: 0 + 0.2222222222 = 0.2222222222
-1.833333333x + x2 = 0.2222222222

The x term is -1.833333333x.  Take half its coefficient (-0.9166666665).
Square it (0.8402777775) and add it to both sides.

Add '0.8402777775' to each side of the equation.
-1.833333333x + 0.8402777775 + x2 = 0.2222222222 + 0.8402777775

Reorder the terms:
0.8402777775 + -1.833333333x + x2 = 0.2222222222 + 0.8402777775

Combine like terms: 0.2222222222 + 0.8402777775 = 1.0624999997
0.8402777775 + -1.833333333x + x2 = 1.0624999997

Factor a perfect square on the left side:
(x + -0.9166666665)(x + -0.9166666665) = 1.0624999997

Calculate the square root of the right side: 1.030776406

Break this problem into two subproblems by setting 
(x + -0.9166666665) equal to 1.030776406 and -1.030776406.

Subproblem 1

x + -0.9166666665 = 1.030776406 Simplifying x + -0.9166666665 = 1.030776406 Reorder the terms: -0.9166666665 + x = 1.030776406 Solving -0.9166666665 + x = 1.030776406 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '0.9166666665' to each side of the equation. -0.9166666665 + 0.9166666665 + x = 1.030776406 + 0.9166666665 Combine like terms: -0.9166666665 + 0.9166666665 = 0.0000000000 0.0000000000 + x = 1.030776406 + 0.9166666665 x = 1.030776406 + 0.9166666665 Combine like terms: 1.030776406 + 0.9166666665 = 1.9474430725 x = 1.9474430725 Simplifying x = 1.9474430725

Subproblem 2

x + -0.9166666665 = -1.030776406 Simplifying x + -0.9166666665 = -1.030776406 Reorder the terms: -0.9166666665 + x = -1.030776406 Solving -0.9166666665 + x = -1.030776406 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '0.9166666665' to each side of the equation. -0.9166666665 + 0.9166666665 + x = -1.030776406 + 0.9166666665 Combine like terms: -0.9166666665 + 0.9166666665 = 0.0000000000 0.0000000000 + x = -1.030776406 + 0.9166666665 x = -1.030776406 + 0.9166666665 Combine like terms: -1.030776406 + 0.9166666665 = -0.1141097395 x = -0.1141097395 Simplifying x = -0.1141097395

Solution

The solution to the problem is based on the solutions from the subproblems. x = {1.9474430725, -0.1141097395}

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