13x^2-4x-33=0

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Solution for 13x^2-4x-33=0 equation:


Simplifying
13x2 + -4x + -33 = 0

Reorder the terms:
-33 + -4x + 13x2 = 0

Solving
-33 + -4x + 13x2 = 0

Solving for variable 'x'.

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

Divide each side by '13'.
-2.538461538 + -0.3076923077x + x2 = 0

Move the constant term to the right:

Add '2.538461538' to each side of the equation.
-2.538461538 + -0.3076923077x + 2.538461538 + x2 = 0 + 2.538461538

Reorder the terms:
-2.538461538 + 2.538461538 + -0.3076923077x + x2 = 0 + 2.538461538

Combine like terms: -2.538461538 + 2.538461538 = 0.000000000
0.000000000 + -0.3076923077x + x2 = 0 + 2.538461538
-0.3076923077x + x2 = 0 + 2.538461538

Combine like terms: 0 + 2.538461538 = 2.538461538
-0.3076923077x + x2 = 2.538461538

The x term is -0.3076923077x.  Take half its coefficient (-0.1538461539).
Square it (0.02366863907) and add it to both sides.

Add '0.02366863907' to each side of the equation.
-0.3076923077x + 0.02366863907 + x2 = 2.538461538 + 0.02366863907

Reorder the terms:
0.02366863907 + -0.3076923077x + x2 = 2.538461538 + 0.02366863907

Combine like terms: 2.538461538 + 0.02366863907 = 2.56213017707
0.02366863907 + -0.3076923077x + x2 = 2.56213017707

Factor a perfect square on the left side:
(x + -0.1538461539)(x + -0.1538461539) = 2.56213017707

Calculate the square root of the right side: 1.600665542

Break this problem into two subproblems by setting 
(x + -0.1538461539) equal to 1.600665542 and -1.600665542.

Subproblem 1

x + -0.1538461539 = 1.600665542 Simplifying x + -0.1538461539 = 1.600665542 Reorder the terms: -0.1538461539 + x = 1.600665542 Solving -0.1538461539 + x = 1.600665542 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '0.1538461539' to each side of the equation. -0.1538461539 + 0.1538461539 + x = 1.600665542 + 0.1538461539 Combine like terms: -0.1538461539 + 0.1538461539 = 0.0000000000 0.0000000000 + x = 1.600665542 + 0.1538461539 x = 1.600665542 + 0.1538461539 Combine like terms: 1.600665542 + 0.1538461539 = 1.7545116959 x = 1.7545116959 Simplifying x = 1.7545116959

Subproblem 2

x + -0.1538461539 = -1.600665542 Simplifying x + -0.1538461539 = -1.600665542 Reorder the terms: -0.1538461539 + x = -1.600665542 Solving -0.1538461539 + x = -1.600665542 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '0.1538461539' to each side of the equation. -0.1538461539 + 0.1538461539 + x = -1.600665542 + 0.1538461539 Combine like terms: -0.1538461539 + 0.1538461539 = 0.0000000000 0.0000000000 + x = -1.600665542 + 0.1538461539 x = -1.600665542 + 0.1538461539 Combine like terms: -1.600665542 + 0.1538461539 = -1.4468193881 x = -1.4468193881 Simplifying x = -1.4468193881

Solution

The solution to the problem is based on the solutions from the subproblems. x = {1.7545116959, -1.4468193881}

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