x^2-0.2x-0.01=0

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Solution for x^2-0.2x-0.01=0 equation:


Simplifying
x2 + -0.2x + -0.01 = 0

Reorder the terms:
-0.01 + -0.2x + x2 = 0

Solving
-0.01 + -0.2x + x2 = 0

Solving for variable 'x'.

Begin completing the square.

Move the constant term to the right:

Add '0.01' to each side of the equation.
-0.01 + -0.2x + 0.01 + x2 = 0 + 0.01

Reorder the terms:
-0.01 + 0.01 + -0.2x + x2 = 0 + 0.01

Combine like terms: -0.01 + 0.01 = 0.00
0.00 + -0.2x + x2 = 0 + 0.01
-0.2x + x2 = 0 + 0.01

Combine like terms: 0 + 0.01 = 0.01
-0.2x + x2 = 0.01

The x term is -0.2x.  Take half its coefficient (-0.1).
Square it (0.01) and add it to both sides.

Add '0.01' to each side of the equation.
-0.2x + 0.01 + x2 = 0.01 + 0.01

Reorder the terms:
0.01 + -0.2x + x2 = 0.01 + 0.01

Combine like terms: 0.01 + 0.01 = 0.02
0.01 + -0.2x + x2 = 0.02

Factor a perfect square on the left side:
(x + -0.1)(x + -0.1) = 0.02

Calculate the square root of the right side: 0.141421356

Break this problem into two subproblems by setting 
(x + -0.1) equal to 0.141421356 and -0.141421356.

Subproblem 1

x + -0.1 = 0.141421356 Simplifying x + -0.1 = 0.141421356 Reorder the terms: -0.1 + x = 0.141421356 Solving -0.1 + x = 0.141421356 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '0.1' to each side of the equation. -0.1 + 0.1 + x = 0.141421356 + 0.1 Combine like terms: -0.1 + 0.1 = 0.0 0.0 + x = 0.141421356 + 0.1 x = 0.141421356 + 0.1 Combine like terms: 0.141421356 + 0.1 = 0.241421356 x = 0.241421356 Simplifying x = 0.241421356

Subproblem 2

x + -0.1 = -0.141421356 Simplifying x + -0.1 = -0.141421356 Reorder the terms: -0.1 + x = -0.141421356 Solving -0.1 + x = -0.141421356 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '0.1' to each side of the equation. -0.1 + 0.1 + x = -0.141421356 + 0.1 Combine like terms: -0.1 + 0.1 = 0.0 0.0 + x = -0.141421356 + 0.1 x = -0.141421356 + 0.1 Combine like terms: -0.141421356 + 0.1 = -0.041421356 x = -0.041421356 Simplifying x = -0.041421356

Solution

The solution to the problem is based on the solutions from the subproblems. x = {0.241421356, -0.041421356}

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