x=0.5(0.25x^2+4.6225-2.15x)

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Solution for x=0.5(0.25x^2+4.6225-2.15x) equation:


Simplifying
x = 0.5(0.25x2 + 4.6225 + -2.15x)

Reorder the terms:
x = 0.5(4.6225 + -2.15x + 0.25x2)
x = (4.6225 * 0.5 + -2.15x * 0.5 + 0.25x2 * 0.5)
x = (2.31125 + -1.075x + 0.125x2)

Solving
x = 2.31125 + -1.075x + 0.125x2

Solving for variable 'x'.

Reorder the terms:
-2.31125 + x + 1.075x + -0.125x2 = 2.31125 + -1.075x + 0.125x2 + -2.31125 + 1.075x + -0.125x2

Combine like terms: x + 1.075x = 2.075x
-2.31125 + 2.075x + -0.125x2 = 2.31125 + -1.075x + 0.125x2 + -2.31125 + 1.075x + -0.125x2

Reorder the terms:
-2.31125 + 2.075x + -0.125x2 = 2.31125 + -2.31125 + -1.075x + 1.075x + 0.125x2 + -0.125x2

Combine like terms: 2.31125 + -2.31125 = 0.00000
-2.31125 + 2.075x + -0.125x2 = 0.00000 + -1.075x + 1.075x + 0.125x2 + -0.125x2
-2.31125 + 2.075x + -0.125x2 = -1.075x + 1.075x + 0.125x2 + -0.125x2

Combine like terms: -1.075x + 1.075x = 0.000
-2.31125 + 2.075x + -0.125x2 = 0.000 + 0.125x2 + -0.125x2
-2.31125 + 2.075x + -0.125x2 = 0.125x2 + -0.125x2

Combine like terms: 0.125x2 + -0.125x2 = 0.000
-2.31125 + 2.075x + -0.125x2 = 0.000

Begin completing the square.  Divide all terms by
-0.125 the coefficient of the squared term: 

Divide each side by '-0.125'.
18.49 + -16.6x + x2 = 0

Move the constant term to the right:

Add '-18.49' to each side of the equation.
18.49 + -16.6x + -18.49 + x2 = 0 + -18.49

Reorder the terms:
18.49 + -18.49 + -16.6x + x2 = 0 + -18.49

Combine like terms: 18.49 + -18.49 = 0.00
0.00 + -16.6x + x2 = 0 + -18.49
-16.6x + x2 = 0 + -18.49

Combine like terms: 0 + -18.49 = -18.49
-16.6x + x2 = -18.49

The x term is -16.6x.  Take half its coefficient (-8.3).
Square it (68.89) and add it to both sides.

Add '68.89' to each side of the equation.
-16.6x + 68.89 + x2 = -18.49 + 68.89

Reorder the terms:
68.89 + -16.6x + x2 = -18.49 + 68.89

Combine like terms: -18.49 + 68.89 = 50.4
68.89 + -16.6x + x2 = 50.4

Factor a perfect square on the left side:
(x + -8.3)(x + -8.3) = 50.4

Calculate the square root of the right side: 7.09929574

Break this problem into two subproblems by setting 
(x + -8.3) equal to 7.09929574 and -7.09929574.

Subproblem 1

x + -8.3 = 7.09929574 Simplifying x + -8.3 = 7.09929574 Reorder the terms: -8.3 + x = 7.09929574 Solving -8.3 + x = 7.09929574 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '8.3' to each side of the equation. -8.3 + 8.3 + x = 7.09929574 + 8.3 Combine like terms: -8.3 + 8.3 = 0.0 0.0 + x = 7.09929574 + 8.3 x = 7.09929574 + 8.3 Combine like terms: 7.09929574 + 8.3 = 15.39929574 x = 15.39929574 Simplifying x = 15.39929574

Subproblem 2

x + -8.3 = -7.09929574 Simplifying x + -8.3 = -7.09929574 Reorder the terms: -8.3 + x = -7.09929574 Solving -8.3 + x = -7.09929574 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '8.3' to each side of the equation. -8.3 + 8.3 + x = -7.09929574 + 8.3 Combine like terms: -8.3 + 8.3 = 0.0 0.0 + x = -7.09929574 + 8.3 x = -7.09929574 + 8.3 Combine like terms: -7.09929574 + 8.3 = 1.20070426 x = 1.20070426 Simplifying x = 1.20070426

Solution

The solution to the problem is based on the solutions from the subproblems. x = {15.39929574, 1.20070426}

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