3x^2-6x-19=19

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Solution for 3x^2-6x-19=19 equation:


Simplifying
3x2 + -6x + -19 = 19

Reorder the terms:
-19 + -6x + 3x2 = 19

Solving
-19 + -6x + 3x2 = 19

Solving for variable 'x'.

Reorder the terms:
-19 + -19 + -6x + 3x2 = 19 + -19

Combine like terms: -19 + -19 = -38
-38 + -6x + 3x2 = 19 + -19

Combine like terms: 19 + -19 = 0
-38 + -6x + 3x2 = 0

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

Divide each side by '3'.
-12.66666667 + -2x + x2 = 0

Move the constant term to the right:

Add '12.66666667' to each side of the equation.
-12.66666667 + -2x + 12.66666667 + x2 = 0 + 12.66666667

Reorder the terms:
-12.66666667 + 12.66666667 + -2x + x2 = 0 + 12.66666667

Combine like terms: -12.66666667 + 12.66666667 = 0.00000000
0.00000000 + -2x + x2 = 0 + 12.66666667
-2x + x2 = 0 + 12.66666667

Combine like terms: 0 + 12.66666667 = 12.66666667
-2x + x2 = 12.66666667

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 = 12.66666667 + 1

Reorder the terms:
1 + -2x + x2 = 12.66666667 + 1

Combine like terms: 12.66666667 + 1 = 13.66666667
1 + -2x + x2 = 13.66666667

Factor a perfect square on the left side:
(x + -1)(x + -1) = 13.66666667

Calculate the square root of the right side: 3.696845503

Break this problem into two subproblems by setting 
(x + -1) equal to 3.696845503 and -3.696845503.

Subproblem 1

x + -1 = 3.696845503 Simplifying x + -1 = 3.696845503 Reorder the terms: -1 + x = 3.696845503 Solving -1 + x = 3.696845503 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 = 3.696845503 + 1 Combine like terms: -1 + 1 = 0 0 + x = 3.696845503 + 1 x = 3.696845503 + 1 Combine like terms: 3.696845503 + 1 = 4.696845503 x = 4.696845503 Simplifying x = 4.696845503

Subproblem 2

x + -1 = -3.696845503 Simplifying x + -1 = -3.696845503 Reorder the terms: -1 + x = -3.696845503 Solving -1 + x = -3.696845503 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 = -3.696845503 + 1 Combine like terms: -1 + 1 = 0 0 + x = -3.696845503 + 1 x = -3.696845503 + 1 Combine like terms: -3.696845503 + 1 = -2.696845503 x = -2.696845503 Simplifying x = -2.696845503

Solution

The solution to the problem is based on the solutions from the subproblems. x = {4.696845503, -2.696845503}

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