2x(x-3)=-1

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


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

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

Solving
-6x + 2x2 = -1

Solving for variable 'x'.

Reorder the terms:
1 + -6x + 2x2 = -1 + 1

Combine like terms: -1 + 1 = 0
1 + -6x + 2x2 = 0

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

Divide each side by '2'.
0.5 + -3x + x2 = 0

Move the constant term to the right:

Add '-0.5' to each side of the equation.
0.5 + -3x + -0.5 + x2 = 0 + -0.5

Reorder the terms:
0.5 + -0.5 + -3x + x2 = 0 + -0.5

Combine like terms: 0.5 + -0.5 = 0.0
0.0 + -3x + x2 = 0 + -0.5
-3x + x2 = 0 + -0.5

Combine like terms: 0 + -0.5 = -0.5
-3x + x2 = -0.5

The x term is -3x.  Take half its coefficient (-1.5).
Square it (2.25) and add it to both sides.

Add '2.25' to each side of the equation.
-3x + 2.25 + x2 = -0.5 + 2.25

Reorder the terms:
2.25 + -3x + x2 = -0.5 + 2.25

Combine like terms: -0.5 + 2.25 = 1.75
2.25 + -3x + x2 = 1.75

Factor a perfect square on the left side:
(x + -1.5)(x + -1.5) = 1.75

Calculate the square root of the right side: 1.322875656

Break this problem into two subproblems by setting 
(x + -1.5) equal to 1.322875656 and -1.322875656.

Subproblem 1

x + -1.5 = 1.322875656 Simplifying x + -1.5 = 1.322875656 Reorder the terms: -1.5 + x = 1.322875656 Solving -1.5 + x = 1.322875656 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '1.5' to each side of the equation. -1.5 + 1.5 + x = 1.322875656 + 1.5 Combine like terms: -1.5 + 1.5 = 0.0 0.0 + x = 1.322875656 + 1.5 x = 1.322875656 + 1.5 Combine like terms: 1.322875656 + 1.5 = 2.822875656 x = 2.822875656 Simplifying x = 2.822875656

Subproblem 2

x + -1.5 = -1.322875656 Simplifying x + -1.5 = -1.322875656 Reorder the terms: -1.5 + x = -1.322875656 Solving -1.5 + x = -1.322875656 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '1.5' to each side of the equation. -1.5 + 1.5 + x = -1.322875656 + 1.5 Combine like terms: -1.5 + 1.5 = 0.0 0.0 + x = -1.322875656 + 1.5 x = -1.322875656 + 1.5 Combine like terms: -1.322875656 + 1.5 = 0.177124344 x = 0.177124344 Simplifying x = 0.177124344

Solution

The solution to the problem is based on the solutions from the subproblems. x = {2.822875656, 0.177124344}

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