x(x-0.3)-0.3=0

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Solution for x(x-0.3)-0.3=0 equation:


Simplifying
x(x + -0.3) + -0.3 = 0

Reorder the terms:
x(-0.3 + x) + -0.3 = 0
(-0.3 * x + x * x) + -0.3 = 0
(-0.3x + x2) + -0.3 = 0

Reorder the terms:
-0.3 + -0.3x + x2 = 0

Solving
-0.3 + -0.3x + x2 = 0

Solving for variable 'x'.

Begin completing the square.

Move the constant term to the right:

Add '0.3' to each side of the equation.
-0.3 + -0.3x + 0.3 + x2 = 0 + 0.3

Reorder the terms:
-0.3 + 0.3 + -0.3x + x2 = 0 + 0.3

Combine like terms: -0.3 + 0.3 = 0.0
0.0 + -0.3x + x2 = 0 + 0.3
-0.3x + x2 = 0 + 0.3

Combine like terms: 0 + 0.3 = 0.3
-0.3x + x2 = 0.3

The x term is -0.3x.  Take half its coefficient (-0.15).
Square it (0.0225) and add it to both sides.

Add '0.0225' to each side of the equation.
-0.3x + 0.0225 + x2 = 0.3 + 0.0225

Reorder the terms:
0.0225 + -0.3x + x2 = 0.3 + 0.0225

Combine like terms: 0.3 + 0.0225 = 0.3225
0.0225 + -0.3x + x2 = 0.3225

Factor a perfect square on the left side:
(x + -0.15)(x + -0.15) = 0.3225

Calculate the square root of the right side: 0.567890835

Break this problem into two subproblems by setting 
(x + -0.15) equal to 0.567890835 and -0.567890835.

Subproblem 1

x + -0.15 = 0.567890835 Simplifying x + -0.15 = 0.567890835 Reorder the terms: -0.15 + x = 0.567890835 Solving -0.15 + x = 0.567890835 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '0.15' to each side of the equation. -0.15 + 0.15 + x = 0.567890835 + 0.15 Combine like terms: -0.15 + 0.15 = 0.00 0.00 + x = 0.567890835 + 0.15 x = 0.567890835 + 0.15 Combine like terms: 0.567890835 + 0.15 = 0.717890835 x = 0.717890835 Simplifying x = 0.717890835

Subproblem 2

x + -0.15 = -0.567890835 Simplifying x + -0.15 = -0.567890835 Reorder the terms: -0.15 + x = -0.567890835 Solving -0.15 + x = -0.567890835 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '0.15' to each side of the equation. -0.15 + 0.15 + x = -0.567890835 + 0.15 Combine like terms: -0.15 + 0.15 = 0.00 0.00 + x = -0.567890835 + 0.15 x = -0.567890835 + 0.15 Combine like terms: -0.567890835 + 0.15 = -0.417890835 x = -0.417890835 Simplifying x = -0.417890835

Solution

The solution to the problem is based on the solutions from the subproblems. x = {0.717890835, -0.417890835}

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