(6x-1)(x-5)=8

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Solution for (6x-1)(x-5)=8 equation:


Simplifying
(6x + -1)(x + -5) = 8

Reorder the terms:
(-1 + 6x)(x + -5) = 8

Reorder the terms:
(-1 + 6x)(-5 + x) = 8

Multiply (-1 + 6x) * (-5 + x)
(-1(-5 + x) + 6x * (-5 + x)) = 8
((-5 * -1 + x * -1) + 6x * (-5 + x)) = 8
((5 + -1x) + 6x * (-5 + x)) = 8
(5 + -1x + (-5 * 6x + x * 6x)) = 8
(5 + -1x + (-30x + 6x2)) = 8

Combine like terms: -1x + -30x = -31x
(5 + -31x + 6x2) = 8

Solving
5 + -31x + 6x2 = 8

Solving for variable 'x'.

Reorder the terms:
5 + -8 + -31x + 6x2 = 8 + -8

Combine like terms: 5 + -8 = -3
-3 + -31x + 6x2 = 8 + -8

Combine like terms: 8 + -8 = 0
-3 + -31x + 6x2 = 0

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

Divide each side by '6'.
-0.5 + -5.166666667x + x2 = 0

Move the constant term to the right:

Add '0.5' to each side of the equation.
-0.5 + -5.166666667x + 0.5 + x2 = 0 + 0.5

Reorder the terms:
-0.5 + 0.5 + -5.166666667x + x2 = 0 + 0.5

Combine like terms: -0.5 + 0.5 = 0.0
0.0 + -5.166666667x + x2 = 0 + 0.5
-5.166666667x + x2 = 0 + 0.5

Combine like terms: 0 + 0.5 = 0.5
-5.166666667x + x2 = 0.5

The x term is -5.166666667x.  Take half its coefficient (-2.583333334).
Square it (6.673611115) and add it to both sides.

Add '6.673611115' to each side of the equation.
-5.166666667x + 6.673611115 + x2 = 0.5 + 6.673611115

Reorder the terms:
6.673611115 + -5.166666667x + x2 = 0.5 + 6.673611115

Combine like terms: 0.5 + 6.673611115 = 7.173611115
6.673611115 + -5.166666667x + x2 = 7.173611115

Factor a perfect square on the left side:
(x + -2.583333334)(x + -2.583333334) = 7.173611115

Calculate the square root of the right side: 2.678359781

Break this problem into two subproblems by setting 
(x + -2.583333334) equal to 2.678359781 and -2.678359781.

Subproblem 1

x + -2.583333334 = 2.678359781 Simplifying x + -2.583333334 = 2.678359781 Reorder the terms: -2.583333334 + x = 2.678359781 Solving -2.583333334 + x = 2.678359781 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '2.583333334' to each side of the equation. -2.583333334 + 2.583333334 + x = 2.678359781 + 2.583333334 Combine like terms: -2.583333334 + 2.583333334 = 0.000000000 0.000000000 + x = 2.678359781 + 2.583333334 x = 2.678359781 + 2.583333334 Combine like terms: 2.678359781 + 2.583333334 = 5.261693115 x = 5.261693115 Simplifying x = 5.261693115

Subproblem 2

x + -2.583333334 = -2.678359781 Simplifying x + -2.583333334 = -2.678359781 Reorder the terms: -2.583333334 + x = -2.678359781 Solving -2.583333334 + x = -2.678359781 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '2.583333334' to each side of the equation. -2.583333334 + 2.583333334 + x = -2.678359781 + 2.583333334 Combine like terms: -2.583333334 + 2.583333334 = 0.000000000 0.000000000 + x = -2.678359781 + 2.583333334 x = -2.678359781 + 2.583333334 Combine like terms: -2.678359781 + 2.583333334 = -0.095026447 x = -0.095026447 Simplifying x = -0.095026447

Solution

The solution to the problem is based on the solutions from the subproblems. x = {5.261693115, -0.095026447}

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