x=0.25x^2-0.125x-12.25

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Solution for x=0.25x^2-0.125x-12.25 equation:


Simplifying
x = 0.25x2 + -0.125x + -12.25

Reorder the terms:
x = -12.25 + -0.125x + 0.25x2

Solving
x = -12.25 + -0.125x + 0.25x2

Solving for variable 'x'.

Reorder the terms:
12.25 + x + 0.125x + -0.25x2 = -12.25 + -0.125x + 0.25x2 + 12.25 + 0.125x + -0.25x2

Combine like terms: x + 0.125x = 1.125x
12.25 + 1.125x + -0.25x2 = -12.25 + -0.125x + 0.25x2 + 12.25 + 0.125x + -0.25x2

Reorder the terms:
12.25 + 1.125x + -0.25x2 = -12.25 + 12.25 + -0.125x + 0.125x + 0.25x2 + -0.25x2

Combine like terms: -12.25 + 12.25 = 0.00
12.25 + 1.125x + -0.25x2 = 0.00 + -0.125x + 0.125x + 0.25x2 + -0.25x2
12.25 + 1.125x + -0.25x2 = -0.125x + 0.125x + 0.25x2 + -0.25x2

Combine like terms: -0.125x + 0.125x = 0.000
12.25 + 1.125x + -0.25x2 = 0.000 + 0.25x2 + -0.25x2
12.25 + 1.125x + -0.25x2 = 0.25x2 + -0.25x2

Combine like terms: 0.25x2 + -0.25x2 = 0.00
12.25 + 1.125x + -0.25x2 = 0.00

Begin completing the square.  Divide all terms by
-0.25 the coefficient of the squared term: 

Divide each side by '-0.25'.
-49 + -4.5x + x2 = 0

Move the constant term to the right:

Add '49' to each side of the equation.
-49 + -4.5x + 49 + x2 = 0 + 49

Reorder the terms:
-49 + 49 + -4.5x + x2 = 0 + 49

Combine like terms: -49 + 49 = 0
0 + -4.5x + x2 = 0 + 49
-4.5x + x2 = 0 + 49

Combine like terms: 0 + 49 = 49
-4.5x + x2 = 49

The x term is -4.5x.  Take half its coefficient (-2.25).
Square it (5.0625) and add it to both sides.

Add '5.0625' to each side of the equation.
-4.5x + 5.0625 + x2 = 49 + 5.0625

Reorder the terms:
5.0625 + -4.5x + x2 = 49 + 5.0625

Combine like terms: 49 + 5.0625 = 54.0625
5.0625 + -4.5x + x2 = 54.0625

Factor a perfect square on the left side:
(x + -2.25)(x + -2.25) = 54.0625

Calculate the square root of the right side: 7.352720585

Break this problem into two subproblems by setting 
(x + -2.25) equal to 7.352720585 and -7.352720585.

Subproblem 1

x + -2.25 = 7.352720585 Simplifying x + -2.25 = 7.352720585 Reorder the terms: -2.25 + x = 7.352720585 Solving -2.25 + x = 7.352720585 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '2.25' to each side of the equation. -2.25 + 2.25 + x = 7.352720585 + 2.25 Combine like terms: -2.25 + 2.25 = 0.00 0.00 + x = 7.352720585 + 2.25 x = 7.352720585 + 2.25 Combine like terms: 7.352720585 + 2.25 = 9.602720585 x = 9.602720585 Simplifying x = 9.602720585

Subproblem 2

x + -2.25 = -7.352720585 Simplifying x + -2.25 = -7.352720585 Reorder the terms: -2.25 + x = -7.352720585 Solving -2.25 + x = -7.352720585 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '2.25' to each side of the equation. -2.25 + 2.25 + x = -7.352720585 + 2.25 Combine like terms: -2.25 + 2.25 = 0.00 0.00 + x = -7.352720585 + 2.25 x = -7.352720585 + 2.25 Combine like terms: -7.352720585 + 2.25 = -5.102720585 x = -5.102720585 Simplifying x = -5.102720585

Solution

The solution to the problem is based on the solutions from the subproblems. x = {9.602720585, -5.102720585}

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