x^2+0.2x-0.24=0

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Solution for x^2+0.2x-0.24=0 equation:


Simplifying
x2 + 0.2x + -0.24 = 0

Reorder the terms:
-0.24 + 0.2x + x2 = 0

Solving
-0.24 + 0.2x + x2 = 0

Solving for variable 'x'.

Begin completing the square.

Move the constant term to the right:

Add '0.24' to each side of the equation.
-0.24 + 0.2x + 0.24 + x2 = 0 + 0.24

Reorder the terms:
-0.24 + 0.24 + 0.2x + x2 = 0 + 0.24

Combine like terms: -0.24 + 0.24 = 0.00
0.00 + 0.2x + x2 = 0 + 0.24
0.2x + x2 = 0 + 0.24

Combine like terms: 0 + 0.24 = 0.24
0.2x + x2 = 0.24

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 = 0.24 + 0.01

Reorder the terms:
0.01 + 0.2x + x2 = 0.24 + 0.01

Combine like terms: 0.24 + 0.01 = 0.25
0.01 + 0.2x + x2 = 0.25

Factor a perfect square on the left side:
(x + 0.1)(x + 0.1) = 0.25

Calculate the square root of the right side: 0.5

Break this problem into two subproblems by setting 
(x + 0.1) equal to 0.5 and -0.5.

Subproblem 1

x + 0.1 = 0.5 Simplifying x + 0.1 = 0.5 Reorder the terms: 0.1 + x = 0.5 Solving 0.1 + x = 0.5 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 = 0.5 + -0.1 Combine like terms: 0.1 + -0.1 = 0.0 0.0 + x = 0.5 + -0.1 x = 0.5 + -0.1 Combine like terms: 0.5 + -0.1 = 0.4 x = 0.4 Simplifying x = 0.4

Subproblem 2

x + 0.1 = -0.5 Simplifying x + 0.1 = -0.5 Reorder the terms: 0.1 + x = -0.5 Solving 0.1 + x = -0.5 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 = -0.5 + -0.1 Combine like terms: 0.1 + -0.1 = 0.0 0.0 + x = -0.5 + -0.1 x = -0.5 + -0.1 Combine like terms: -0.5 + -0.1 = -0.6 x = -0.6 Simplifying x = -0.6

Solution

The solution to the problem is based on the solutions from the subproblems. x = {0.4, -0.6}

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