x^2-.25x-.55=0

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Solution for x^2-.25x-.55=0 equation:


Simplifying
x2 + -0.25x + -0.55 = 0

Reorder the terms:
-0.55 + -0.25x + x2 = 0

Solving
-0.55 + -0.25x + x2 = 0

Solving for variable 'x'.

Begin completing the square.

Move the constant term to the right:

Add '0.55' to each side of the equation.
-0.55 + -0.25x + 0.55 + x2 = 0 + 0.55

Reorder the terms:
-0.55 + 0.55 + -0.25x + x2 = 0 + 0.55

Combine like terms: -0.55 + 0.55 = 0.00
0.00 + -0.25x + x2 = 0 + 0.55
-0.25x + x2 = 0 + 0.55

Combine like terms: 0 + 0.55 = 0.55
-0.25x + x2 = 0.55

The x term is -0.25x.  Take half its coefficient (-0.125).
Square it (0.015625) and add it to both sides.

Add '0.015625' to each side of the equation.
-0.25x + 0.015625 + x2 = 0.55 + 0.015625

Reorder the terms:
0.015625 + -0.25x + x2 = 0.55 + 0.015625

Combine like terms: 0.55 + 0.015625 = 0.565625
0.015625 + -0.25x + x2 = 0.565625

Factor a perfect square on the left side:
(x + -0.125)(x + -0.125) = 0.565625

Calculate the square root of the right side: 0.752080448

Break this problem into two subproblems by setting 
(x + -0.125) equal to 0.752080448 and -0.752080448.

Subproblem 1

x + -0.125 = 0.752080448 Simplifying x + -0.125 = 0.752080448 Reorder the terms: -0.125 + x = 0.752080448 Solving -0.125 + x = 0.752080448 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '0.125' to each side of the equation. -0.125 + 0.125 + x = 0.752080448 + 0.125 Combine like terms: -0.125 + 0.125 = 0.000 0.000 + x = 0.752080448 + 0.125 x = 0.752080448 + 0.125 Combine like terms: 0.752080448 + 0.125 = 0.877080448 x = 0.877080448 Simplifying x = 0.877080448

Subproblem 2

x + -0.125 = -0.752080448 Simplifying x + -0.125 = -0.752080448 Reorder the terms: -0.125 + x = -0.752080448 Solving -0.125 + x = -0.752080448 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '0.125' to each side of the equation. -0.125 + 0.125 + x = -0.752080448 + 0.125 Combine like terms: -0.125 + 0.125 = 0.000 0.000 + x = -0.752080448 + 0.125 x = -0.752080448 + 0.125 Combine like terms: -0.752080448 + 0.125 = -0.627080448 x = -0.627080448 Simplifying x = -0.627080448

Solution

The solution to the problem is based on the solutions from the subproblems. x = {0.877080448, -0.627080448}

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