0=3x^2-6x-26

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Solution for 0=3x^2-6x-26 equation:


Simplifying
0 = 3x2 + -6x + -26

Reorder the terms:
0 = -26 + -6x + 3x2

Solving
0 = -26 + -6x + 3x2

Solving for variable 'x'.

Combine like terms: 0 + 26 = 26
26 + 6x + -3x2 = -26 + -6x + 3x2 + 26 + 6x + -3x2

Reorder the terms:
26 + 6x + -3x2 = -26 + 26 + -6x + 6x + 3x2 + -3x2

Combine like terms: -26 + 26 = 0
26 + 6x + -3x2 = 0 + -6x + 6x + 3x2 + -3x2
26 + 6x + -3x2 = -6x + 6x + 3x2 + -3x2

Combine like terms: -6x + 6x = 0
26 + 6x + -3x2 = 0 + 3x2 + -3x2
26 + 6x + -3x2 = 3x2 + -3x2

Combine like terms: 3x2 + -3x2 = 0
26 + 6x + -3x2 = 0

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

Divide each side by '-3'.
-8.666666667 + -2x + x2 = 0

Move the constant term to the right:

Add '8.666666667' to each side of the equation.
-8.666666667 + -2x + 8.666666667 + x2 = 0 + 8.666666667

Reorder the terms:
-8.666666667 + 8.666666667 + -2x + x2 = 0 + 8.666666667

Combine like terms: -8.666666667 + 8.666666667 = 0.000000000
0.000000000 + -2x + x2 = 0 + 8.666666667
-2x + x2 = 0 + 8.666666667

Combine like terms: 0 + 8.666666667 = 8.666666667
-2x + x2 = 8.666666667

The x term is -2x.  Take half its coefficient (-1).
Square it (1) and add it to both sides.

Add '1' to each side of the equation.
-2x + 1 + x2 = 8.666666667 + 1

Reorder the terms:
1 + -2x + x2 = 8.666666667 + 1

Combine like terms: 8.666666667 + 1 = 9.666666667
1 + -2x + x2 = 9.666666667

Factor a perfect square on the left side:
(x + -1)(x + -1) = 9.666666667

Calculate the square root of the right side: 3.109126351

Break this problem into two subproblems by setting 
(x + -1) equal to 3.109126351 and -3.109126351.

Subproblem 1

x + -1 = 3.109126351 Simplifying x + -1 = 3.109126351 Reorder the terms: -1 + x = 3.109126351 Solving -1 + x = 3.109126351 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '1' to each side of the equation. -1 + 1 + x = 3.109126351 + 1 Combine like terms: -1 + 1 = 0 0 + x = 3.109126351 + 1 x = 3.109126351 + 1 Combine like terms: 3.109126351 + 1 = 4.109126351 x = 4.109126351 Simplifying x = 4.109126351

Subproblem 2

x + -1 = -3.109126351 Simplifying x + -1 = -3.109126351 Reorder the terms: -1 + x = -3.109126351 Solving -1 + x = -3.109126351 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '1' to each side of the equation. -1 + 1 + x = -3.109126351 + 1 Combine like terms: -1 + 1 = 0 0 + x = -3.109126351 + 1 x = -3.109126351 + 1 Combine like terms: -3.109126351 + 1 = -2.109126351 x = -2.109126351 Simplifying x = -2.109126351

Solution

The solution to the problem is based on the solutions from the subproblems. x = {4.109126351, -2.109126351}

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