31x(x-1)=6

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Solution for 31x(x-1)=6 equation:


Simplifying
31x(x + -1) = 6

Reorder the terms:
31x(-1 + x) = 6
(-1 * 31x + x * 31x) = 6
(-31x + 31x2) = 6

Solving
-31x + 31x2 = 6

Solving for variable 'x'.

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

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

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

Divide each side by '31'.
-0.1935483871 + -1x + x2 = 0

Move the constant term to the right:

Add '0.1935483871' to each side of the equation.
-0.1935483871 + -1x + 0.1935483871 + x2 = 0 + 0.1935483871

Reorder the terms:
-0.1935483871 + 0.1935483871 + -1x + x2 = 0 + 0.1935483871

Combine like terms: -0.1935483871 + 0.1935483871 = 0.0000000000
0.0000000000 + -1x + x2 = 0 + 0.1935483871
-1x + x2 = 0 + 0.1935483871

Combine like terms: 0 + 0.1935483871 = 0.1935483871
-1x + x2 = 0.1935483871

The x term is -1x.  Take half its coefficient (-0.5).
Square it (0.25) and add it to both sides.

Add '0.25' to each side of the equation.
-1x + 0.25 + x2 = 0.1935483871 + 0.25

Reorder the terms:
0.25 + -1x + x2 = 0.1935483871 + 0.25

Combine like terms: 0.1935483871 + 0.25 = 0.4435483871
0.25 + -1x + x2 = 0.4435483871

Factor a perfect square on the left side:
(x + -0.5)(x + -0.5) = 0.4435483871

Calculate the square root of the right side: 0.665994285

Break this problem into two subproblems by setting 
(x + -0.5) equal to 0.665994285 and -0.665994285.

Subproblem 1

x + -0.5 = 0.665994285 Simplifying x + -0.5 = 0.665994285 Reorder the terms: -0.5 + x = 0.665994285 Solving -0.5 + x = 0.665994285 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '0.5' to each side of the equation. -0.5 + 0.5 + x = 0.665994285 + 0.5 Combine like terms: -0.5 + 0.5 = 0.0 0.0 + x = 0.665994285 + 0.5 x = 0.665994285 + 0.5 Combine like terms: 0.665994285 + 0.5 = 1.165994285 x = 1.165994285 Simplifying x = 1.165994285

Subproblem 2

x + -0.5 = -0.665994285 Simplifying x + -0.5 = -0.665994285 Reorder the terms: -0.5 + x = -0.665994285 Solving -0.5 + x = -0.665994285 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '0.5' to each side of the equation. -0.5 + 0.5 + x = -0.665994285 + 0.5 Combine like terms: -0.5 + 0.5 = 0.0 0.0 + x = -0.665994285 + 0.5 x = -0.665994285 + 0.5 Combine like terms: -0.665994285 + 0.5 = -0.165994285 x = -0.165994285 Simplifying x = -0.165994285

Solution

The solution to the problem is based on the solutions from the subproblems. x = {1.165994285, -0.165994285}

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