-3x(6x-1)-2x=-7

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Solution for -3x(6x-1)-2x=-7 equation:


Simplifying
-3x(6x + -1) + -2x = -7

Reorder the terms:
-3x(-1 + 6x) + -2x = -7
(-1 * -3x + 6x * -3x) + -2x = -7
(3x + -18x2) + -2x = -7

Reorder the terms:
3x + -2x + -18x2 = -7

Combine like terms: 3x + -2x = 1x
1x + -18x2 = -7

Solving
1x + -18x2 = -7

Solving for variable 'x'.

Reorder the terms:
7 + 1x + -18x2 = -7 + 7

Combine like terms: -7 + 7 = 0
7 + 1x + -18x2 = 0

Begin completing the square.  Divide all terms by
-18 the coefficient of the squared term: 

Divide each side by '-18'.
-0.3888888889 + -0.05555555556x + x2 = 0

Move the constant term to the right:

Add '0.3888888889' to each side of the equation.
-0.3888888889 + -0.05555555556x + 0.3888888889 + x2 = 0 + 0.3888888889

Reorder the terms:
-0.3888888889 + 0.3888888889 + -0.05555555556x + x2 = 0 + 0.3888888889

Combine like terms: -0.3888888889 + 0.3888888889 = 0.0000000000
0.0000000000 + -0.05555555556x + x2 = 0 + 0.3888888889
-0.05555555556x + x2 = 0 + 0.3888888889

Combine like terms: 0 + 0.3888888889 = 0.3888888889
-0.05555555556x + x2 = 0.3888888889

The x term is -0.05555555556x.  Take half its coefficient (-0.02777777778).
Square it (0.0007716049384) and add it to both sides.

Add '0.0007716049384' to each side of the equation.
-0.05555555556x + 0.0007716049384 + x2 = 0.3888888889 + 0.0007716049384

Reorder the terms:
0.0007716049384 + -0.05555555556x + x2 = 0.3888888889 + 0.0007716049384

Combine like terms: 0.3888888889 + 0.0007716049384 = 0.3896604938384
0.0007716049384 + -0.05555555556x + x2 = 0.3896604938384

Factor a perfect square on the left side:
(x + -0.02777777778)(x + -0.02777777778) = 0.3896604938384

Calculate the square root of the right side: 0.624227918

Break this problem into two subproblems by setting 
(x + -0.02777777778) equal to 0.624227918 and -0.624227918.

Subproblem 1

x + -0.02777777778 = 0.624227918 Simplifying x + -0.02777777778 = 0.624227918 Reorder the terms: -0.02777777778 + x = 0.624227918 Solving -0.02777777778 + x = 0.624227918 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '0.02777777778' to each side of the equation. -0.02777777778 + 0.02777777778 + x = 0.624227918 + 0.02777777778 Combine like terms: -0.02777777778 + 0.02777777778 = 0.00000000000 0.00000000000 + x = 0.624227918 + 0.02777777778 x = 0.624227918 + 0.02777777778 Combine like terms: 0.624227918 + 0.02777777778 = 0.65200569578 x = 0.65200569578 Simplifying x = 0.65200569578

Subproblem 2

x + -0.02777777778 = -0.624227918 Simplifying x + -0.02777777778 = -0.624227918 Reorder the terms: -0.02777777778 + x = -0.624227918 Solving -0.02777777778 + x = -0.624227918 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '0.02777777778' to each side of the equation. -0.02777777778 + 0.02777777778 + x = -0.624227918 + 0.02777777778 Combine like terms: -0.02777777778 + 0.02777777778 = 0.00000000000 0.00000000000 + x = -0.624227918 + 0.02777777778 x = -0.624227918 + 0.02777777778 Combine like terms: -0.624227918 + 0.02777777778 = -0.59645014022 x = -0.59645014022 Simplifying x = -0.59645014022

Solution

The solution to the problem is based on the solutions from the subproblems. x = {0.65200569578, -0.59645014022}

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