3x(3x-2)-x-8=10

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Solution for 3x(3x-2)-x-8=10 equation:


Simplifying
3x(3x + -2) + -1x + -8 = 10

Reorder the terms:
3x(-2 + 3x) + -1x + -8 = 10
(-2 * 3x + 3x * 3x) + -1x + -8 = 10
(-6x + 9x2) + -1x + -8 = 10

Reorder the terms:
-8 + -6x + -1x + 9x2 = 10

Combine like terms: -6x + -1x = -7x
-8 + -7x + 9x2 = 10

Solving
-8 + -7x + 9x2 = 10

Solving for variable 'x'.

Reorder the terms:
-8 + -10 + -7x + 9x2 = 10 + -10

Combine like terms: -8 + -10 = -18
-18 + -7x + 9x2 = 10 + -10

Combine like terms: 10 + -10 = 0
-18 + -7x + 9x2 = 0

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

Divide each side by '9'.
-2 + -0.7777777778x + x2 = 0

Move the constant term to the right:

Add '2' to each side of the equation.
-2 + -0.7777777778x + 2 + x2 = 0 + 2

Reorder the terms:
-2 + 2 + -0.7777777778x + x2 = 0 + 2

Combine like terms: -2 + 2 = 0
0 + -0.7777777778x + x2 = 0 + 2
-0.7777777778x + x2 = 0 + 2

Combine like terms: 0 + 2 = 2
-0.7777777778x + x2 = 2

The x term is -0.7777777778x.  Take half its coefficient (-0.3888888889).
Square it (0.1512345679) and add it to both sides.

Add '0.1512345679' to each side of the equation.
-0.7777777778x + 0.1512345679 + x2 = 2 + 0.1512345679

Reorder the terms:
0.1512345679 + -0.7777777778x + x2 = 2 + 0.1512345679

Combine like terms: 2 + 0.1512345679 = 2.1512345679
0.1512345679 + -0.7777777778x + x2 = 2.1512345679

Factor a perfect square on the left side:
(x + -0.3888888889)(x + -0.3888888889) = 2.1512345679

Calculate the square root of the right side: 1.466708754

Break this problem into two subproblems by setting 
(x + -0.3888888889) equal to 1.466708754 and -1.466708754.

Subproblem 1

x + -0.3888888889 = 1.466708754 Simplifying x + -0.3888888889 = 1.466708754 Reorder the terms: -0.3888888889 + x = 1.466708754 Solving -0.3888888889 + x = 1.466708754 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '0.3888888889' to each side of the equation. -0.3888888889 + 0.3888888889 + x = 1.466708754 + 0.3888888889 Combine like terms: -0.3888888889 + 0.3888888889 = 0.0000000000 0.0000000000 + x = 1.466708754 + 0.3888888889 x = 1.466708754 + 0.3888888889 Combine like terms: 1.466708754 + 0.3888888889 = 1.8555976429 x = 1.8555976429 Simplifying x = 1.8555976429

Subproblem 2

x + -0.3888888889 = -1.466708754 Simplifying x + -0.3888888889 = -1.466708754 Reorder the terms: -0.3888888889 + x = -1.466708754 Solving -0.3888888889 + x = -1.466708754 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '0.3888888889' to each side of the equation. -0.3888888889 + 0.3888888889 + x = -1.466708754 + 0.3888888889 Combine like terms: -0.3888888889 + 0.3888888889 = 0.0000000000 0.0000000000 + x = -1.466708754 + 0.3888888889 x = -1.466708754 + 0.3888888889 Combine like terms: -1.466708754 + 0.3888888889 = -1.0778198651 x = -1.0778198651 Simplifying x = -1.0778198651

Solution

The solution to the problem is based on the solutions from the subproblems. x = {1.8555976429, -1.0778198651}

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