(x-0.2222)(x+0.5)=0

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Solution for (x-0.2222)(x+0.5)=0 equation:


Simplifying
(x + -0.2222)(x + 0.5) = 0

Reorder the terms:
(-0.2222 + x)(x + 0.5) = 0

Reorder the terms:
(-0.2222 + x)(0.5 + x) = 0

Multiply (-0.2222 + x) * (0.5 + x)
(-0.2222(0.5 + x) + x(0.5 + x)) = 0
((0.5 * -0.2222 + x * -0.2222) + x(0.5 + x)) = 0
((-0.1111 + -0.2222x) + x(0.5 + x)) = 0
(-0.1111 + -0.2222x + (0.5 * x + x * x)) = 0
(-0.1111 + -0.2222x + (0.5x + x2)) = 0

Combine like terms: -0.2222x + 0.5x = 0.2778x
(-0.1111 + 0.2778x + x2) = 0

Solving
-0.1111 + 0.2778x + x2 = 0

Solving for variable 'x'.

Begin completing the square.

Move the constant term to the right:

Add '0.1111' to each side of the equation.
-0.1111 + 0.2778x + 0.1111 + x2 = 0 + 0.1111

Reorder the terms:
-0.1111 + 0.1111 + 0.2778x + x2 = 0 + 0.1111

Combine like terms: -0.1111 + 0.1111 = 0.0000
0.0000 + 0.2778x + x2 = 0 + 0.1111
0.2778x + x2 = 0 + 0.1111

Combine like terms: 0 + 0.1111 = 0.1111
0.2778x + x2 = 0.1111

The x term is 0.2778x.  Take half its coefficient (0.1389).
Square it (0.01929321) and add it to both sides.

Add '0.01929321' to each side of the equation.
0.2778x + 0.01929321 + x2 = 0.1111 + 0.01929321

Reorder the terms:
0.01929321 + 0.2778x + x2 = 0.1111 + 0.01929321

Combine like terms: 0.1111 + 0.01929321 = 0.13039321
0.01929321 + 0.2778x + x2 = 0.13039321

Factor a perfect square on the left side:
(x + 0.1389)(x + 0.1389) = 0.13039321

Calculate the square root of the right side: 0.3611

Break this problem into two subproblems by setting 
(x + 0.1389) equal to 0.3611 and -0.3611.

Subproblem 1

x + 0.1389 = 0.3611 Simplifying x + 0.1389 = 0.3611 Reorder the terms: 0.1389 + x = 0.3611 Solving 0.1389 + x = 0.3611 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.1389' to each side of the equation. 0.1389 + -0.1389 + x = 0.3611 + -0.1389 Combine like terms: 0.1389 + -0.1389 = 0.0000 0.0000 + x = 0.3611 + -0.1389 x = 0.3611 + -0.1389 Combine like terms: 0.3611 + -0.1389 = 0.2222 x = 0.2222 Simplifying x = 0.2222

Subproblem 2

x + 0.1389 = -0.3611 Simplifying x + 0.1389 = -0.3611 Reorder the terms: 0.1389 + x = -0.3611 Solving 0.1389 + x = -0.3611 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.1389' to each side of the equation. 0.1389 + -0.1389 + x = -0.3611 + -0.1389 Combine like terms: 0.1389 + -0.1389 = 0.0000 0.0000 + x = -0.3611 + -0.1389 x = -0.3611 + -0.1389 Combine like terms: -0.3611 + -0.1389 = -0.5 x = -0.5 Simplifying x = -0.5

Solution

The solution to the problem is based on the solutions from the subproblems. x = {0.2222, -0.5}

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