6x^2-11x-10=8

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Solution for 6x^2-11x-10=8 equation:


Simplifying
6x2 + -11x + -10 = 8

Reorder the terms:
-10 + -11x + 6x2 = 8

Solving
-10 + -11x + 6x2 = 8

Solving for variable 'x'.

Reorder the terms:
-10 + -8 + -11x + 6x2 = 8 + -8

Combine like terms: -10 + -8 = -18
-18 + -11x + 6x2 = 8 + -8

Combine like terms: 8 + -8 = 0
-18 + -11x + 6x2 = 0

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

Divide each side by '6'.
-3 + -1.833333333x + x2 = 0

Move the constant term to the right:

Add '3' to each side of the equation.
-3 + -1.833333333x + 3 + x2 = 0 + 3

Reorder the terms:
-3 + 3 + -1.833333333x + x2 = 0 + 3

Combine like terms: -3 + 3 = 0
0 + -1.833333333x + x2 = 0 + 3
-1.833333333x + x2 = 0 + 3

Combine like terms: 0 + 3 = 3
-1.833333333x + x2 = 3

The x term is -1.833333333x.  Take half its coefficient (-0.9166666665).
Square it (0.8402777775) and add it to both sides.

Add '0.8402777775' to each side of the equation.
-1.833333333x + 0.8402777775 + x2 = 3 + 0.8402777775

Reorder the terms:
0.8402777775 + -1.833333333x + x2 = 3 + 0.8402777775

Combine like terms: 3 + 0.8402777775 = 3.8402777775
0.8402777775 + -1.833333333x + x2 = 3.8402777775

Factor a perfect square on the left side:
(x + -0.9166666665)(x + -0.9166666665) = 3.8402777775

Calculate the square root of the right side: 1.959662669

Break this problem into two subproblems by setting 
(x + -0.9166666665) equal to 1.959662669 and -1.959662669.

Subproblem 1

x + -0.9166666665 = 1.959662669 Simplifying x + -0.9166666665 = 1.959662669 Reorder the terms: -0.9166666665 + x = 1.959662669 Solving -0.9166666665 + x = 1.959662669 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '0.9166666665' to each side of the equation. -0.9166666665 + 0.9166666665 + x = 1.959662669 + 0.9166666665 Combine like terms: -0.9166666665 + 0.9166666665 = 0.0000000000 0.0000000000 + x = 1.959662669 + 0.9166666665 x = 1.959662669 + 0.9166666665 Combine like terms: 1.959662669 + 0.9166666665 = 2.8763293355 x = 2.8763293355 Simplifying x = 2.8763293355

Subproblem 2

x + -0.9166666665 = -1.959662669 Simplifying x + -0.9166666665 = -1.959662669 Reorder the terms: -0.9166666665 + x = -1.959662669 Solving -0.9166666665 + x = -1.959662669 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '0.9166666665' to each side of the equation. -0.9166666665 + 0.9166666665 + x = -1.959662669 + 0.9166666665 Combine like terms: -0.9166666665 + 0.9166666665 = 0.0000000000 0.0000000000 + x = -1.959662669 + 0.9166666665 x = -1.959662669 + 0.9166666665 Combine like terms: -1.959662669 + 0.9166666665 = -1.0429960025 x = -1.0429960025 Simplifying x = -1.0429960025

Solution

The solution to the problem is based on the solutions from the subproblems. x = {2.8763293355, -1.0429960025}

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