3x(4x-8)=-1

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Solution for 3x(4x-8)=-1 equation:


Simplifying
3x(4x + -8) = -1

Reorder the terms:
3x(-8 + 4x) = -1
(-8 * 3x + 4x * 3x) = -1
(-24x + 12x2) = -1

Solving
-24x + 12x2 = -1

Solving for variable 'x'.

Reorder the terms:
1 + -24x + 12x2 = -1 + 1

Combine like terms: -1 + 1 = 0
1 + -24x + 12x2 = 0

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

Divide each side by '12'.
0.08333333333 + -2x + x2 = 0

Move the constant term to the right:

Add '-0.08333333333' to each side of the equation.
0.08333333333 + -2x + -0.08333333333 + x2 = 0 + -0.08333333333

Reorder the terms:
0.08333333333 + -0.08333333333 + -2x + x2 = 0 + -0.08333333333

Combine like terms: 0.08333333333 + -0.08333333333 = 0.00000000000
0.00000000000 + -2x + x2 = 0 + -0.08333333333
-2x + x2 = 0 + -0.08333333333

Combine like terms: 0 + -0.08333333333 = -0.08333333333
-2x + x2 = -0.08333333333

The x term is -2x.  Take half its coefficient (-1).
Square it (1) and add it to both sides.

Add '1' to each side of the equation.
-2x + 1 + x2 = -0.08333333333 + 1

Reorder the terms:
1 + -2x + x2 = -0.08333333333 + 1

Combine like terms: -0.08333333333 + 1 = 0.91666666667
1 + -2x + x2 = 0.91666666667

Factor a perfect square on the left side:
(x + -1)(x + -1) = 0.91666666667

Calculate the square root of the right side: 0.957427108

Break this problem into two subproblems by setting 
(x + -1) equal to 0.957427108 and -0.957427108.

Subproblem 1

x + -1 = 0.957427108 Simplifying x + -1 = 0.957427108 Reorder the terms: -1 + x = 0.957427108 Solving -1 + x = 0.957427108 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '1' to each side of the equation. -1 + 1 + x = 0.957427108 + 1 Combine like terms: -1 + 1 = 0 0 + x = 0.957427108 + 1 x = 0.957427108 + 1 Combine like terms: 0.957427108 + 1 = 1.957427108 x = 1.957427108 Simplifying x = 1.957427108

Subproblem 2

x + -1 = -0.957427108 Simplifying x + -1 = -0.957427108 Reorder the terms: -1 + x = -0.957427108 Solving -1 + x = -0.957427108 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '1' to each side of the equation. -1 + 1 + x = -0.957427108 + 1 Combine like terms: -1 + 1 = 0 0 + x = -0.957427108 + 1 x = -0.957427108 + 1 Combine like terms: -0.957427108 + 1 = 0.042572892 x = 0.042572892 Simplifying x = 0.042572892

Solution

The solution to the problem is based on the solutions from the subproblems. x = {1.957427108, 0.042572892}

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