3x^2-8x-34=0

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Solution for 3x^2-8x-34=0 equation:


Simplifying
3x2 + -8x + -34 = 0

Reorder the terms:
-34 + -8x + 3x2 = 0

Solving
-34 + -8x + 3x2 = 0

Solving for variable 'x'.

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

Divide each side by '3'.
-11.33333333 + -2.666666667x + x2 = 0

Move the constant term to the right:

Add '11.33333333' to each side of the equation.
-11.33333333 + -2.666666667x + 11.33333333 + x2 = 0 + 11.33333333

Reorder the terms:
-11.33333333 + 11.33333333 + -2.666666667x + x2 = 0 + 11.33333333

Combine like terms: -11.33333333 + 11.33333333 = 0.00000000
0.00000000 + -2.666666667x + x2 = 0 + 11.33333333
-2.666666667x + x2 = 0 + 11.33333333

Combine like terms: 0 + 11.33333333 = 11.33333333
-2.666666667x + x2 = 11.33333333

The x term is -2.666666667x.  Take half its coefficient (-1.333333334).
Square it (1.777777780) and add it to both sides.

Add '1.777777780' to each side of the equation.
-2.666666667x + 1.777777780 + x2 = 11.33333333 + 1.777777780

Reorder the terms:
1.777777780 + -2.666666667x + x2 = 11.33333333 + 1.777777780

Combine like terms: 11.33333333 + 1.777777780 = 13.11111111
1.777777780 + -2.666666667x + x2 = 13.11111111

Factor a perfect square on the left side:
(x + -1.333333334)(x + -1.333333334) = 13.11111111

Calculate the square root of the right side: 3.62092683

Break this problem into two subproblems by setting 
(x + -1.333333334) equal to 3.62092683 and -3.62092683.

Subproblem 1

x + -1.333333334 = 3.62092683 Simplifying x + -1.333333334 = 3.62092683 Reorder the terms: -1.333333334 + x = 3.62092683 Solving -1.333333334 + x = 3.62092683 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '1.333333334' to each side of the equation. -1.333333334 + 1.333333334 + x = 3.62092683 + 1.333333334 Combine like terms: -1.333333334 + 1.333333334 = 0.000000000 0.000000000 + x = 3.62092683 + 1.333333334 x = 3.62092683 + 1.333333334 Combine like terms: 3.62092683 + 1.333333334 = 4.954260164 x = 4.954260164 Simplifying x = 4.954260164

Subproblem 2

x + -1.333333334 = -3.62092683 Simplifying x + -1.333333334 = -3.62092683 Reorder the terms: -1.333333334 + x = -3.62092683 Solving -1.333333334 + x = -3.62092683 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '1.333333334' to each side of the equation. -1.333333334 + 1.333333334 + x = -3.62092683 + 1.333333334 Combine like terms: -1.333333334 + 1.333333334 = 0.000000000 0.000000000 + x = -3.62092683 + 1.333333334 x = -3.62092683 + 1.333333334 Combine like terms: -3.62092683 + 1.333333334 = -2.287593496 x = -2.287593496 Simplifying x = -2.287593496

Solution

The solution to the problem is based on the solutions from the subproblems. x = {4.954260164, -2.287593496}

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