x^2+0.5x=0.5

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Solution for x^2+0.5x=0.5 equation:


Simplifying
x2 + 0.5x = 0.5

Reorder the terms:
0.5x + x2 = 0.5

Solving
0.5x + x2 = 0.5

Solving for variable 'x'.

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

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

Begin completing the square.

Move the constant term to the right:

Add '0.5' to each side of the equation.
-0.5 + 0.5x + 0.5 + x2 = 0.0 + 0.5

Reorder the terms:
-0.5 + 0.5 + 0.5x + x2 = 0.0 + 0.5

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

Combine like terms: 0.0 + 0.5 = 0.5
0.5x + x2 = 0.5

The x term is 0.5x.  Take half its coefficient (0.25).
Square it (0.0625) and add it to both sides.

Add '0.0625' to each side of the equation.
0.5x + 0.0625 + x2 = 0.5 + 0.0625

Reorder the terms:
0.0625 + 0.5x + x2 = 0.5 + 0.0625

Combine like terms: 0.5 + 0.0625 = 0.5625
0.0625 + 0.5x + x2 = 0.5625

Factor a perfect square on the left side:
(x + 0.25)(x + 0.25) = 0.5625

Calculate the square root of the right side: 0.75

Break this problem into two subproblems by setting 
(x + 0.25) equal to 0.75 and -0.75.

Subproblem 1

x + 0.25 = 0.75 Simplifying x + 0.25 = 0.75 Reorder the terms: 0.25 + x = 0.75 Solving 0.25 + x = 0.75 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.25' to each side of the equation. 0.25 + -0.25 + x = 0.75 + -0.25 Combine like terms: 0.25 + -0.25 = 0.00 0.00 + x = 0.75 + -0.25 x = 0.75 + -0.25 Combine like terms: 0.75 + -0.25 = 0.5 x = 0.5 Simplifying x = 0.5

Subproblem 2

x + 0.25 = -0.75 Simplifying x + 0.25 = -0.75 Reorder the terms: 0.25 + x = -0.75 Solving 0.25 + x = -0.75 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.25' to each side of the equation. 0.25 + -0.25 + x = -0.75 + -0.25 Combine like terms: 0.25 + -0.25 = 0.00 0.00 + x = -0.75 + -0.25 x = -0.75 + -0.25 Combine like terms: -0.75 + -0.25 = -1 x = -1 Simplifying x = -1

Solution

The solution to the problem is based on the solutions from the subproblems. x = {0.5, -1}

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