6x^2-15x-19=0

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Solution for 6x^2-15x-19=0 equation:


Simplifying
6x2 + -15x + -19 = 0

Reorder the terms:
-19 + -15x + 6x2 = 0

Solving
-19 + -15x + 6x2 = 0

Solving for variable 'x'.

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

Divide each side by '6'.
-3.166666667 + -2.5x + x2 = 0

Move the constant term to the right:

Add '3.166666667' to each side of the equation.
-3.166666667 + -2.5x + 3.166666667 + x2 = 0 + 3.166666667

Reorder the terms:
-3.166666667 + 3.166666667 + -2.5x + x2 = 0 + 3.166666667

Combine like terms: -3.166666667 + 3.166666667 = 0.000000000
0.000000000 + -2.5x + x2 = 0 + 3.166666667
-2.5x + x2 = 0 + 3.166666667

Combine like terms: 0 + 3.166666667 = 3.166666667
-2.5x + x2 = 3.166666667

The x term is -2.5x.  Take half its coefficient (-1.25).
Square it (1.5625) and add it to both sides.

Add '1.5625' to each side of the equation.
-2.5x + 1.5625 + x2 = 3.166666667 + 1.5625

Reorder the terms:
1.5625 + -2.5x + x2 = 3.166666667 + 1.5625

Combine like terms: 3.166666667 + 1.5625 = 4.729166667
1.5625 + -2.5x + x2 = 4.729166667

Factor a perfect square on the left side:
(x + -1.25)(x + -1.25) = 4.729166667

Calculate the square root of the right side: 2.174664725

Break this problem into two subproblems by setting 
(x + -1.25) equal to 2.174664725 and -2.174664725.

Subproblem 1

x + -1.25 = 2.174664725 Simplifying x + -1.25 = 2.174664725 Reorder the terms: -1.25 + x = 2.174664725 Solving -1.25 + x = 2.174664725 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '1.25' to each side of the equation. -1.25 + 1.25 + x = 2.174664725 + 1.25 Combine like terms: -1.25 + 1.25 = 0.00 0.00 + x = 2.174664725 + 1.25 x = 2.174664725 + 1.25 Combine like terms: 2.174664725 + 1.25 = 3.424664725 x = 3.424664725 Simplifying x = 3.424664725

Subproblem 2

x + -1.25 = -2.174664725 Simplifying x + -1.25 = -2.174664725 Reorder the terms: -1.25 + x = -2.174664725 Solving -1.25 + x = -2.174664725 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '1.25' to each side of the equation. -1.25 + 1.25 + x = -2.174664725 + 1.25 Combine like terms: -1.25 + 1.25 = 0.00 0.00 + x = -2.174664725 + 1.25 x = -2.174664725 + 1.25 Combine like terms: -2.174664725 + 1.25 = -0.924664725 x = -0.924664725 Simplifying x = -0.924664725

Solution

The solution to the problem is based on the solutions from the subproblems. x = {3.424664725, -0.924664725}

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