x=.0216+.42x+x^2

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Solution for x=.0216+.42x+x^2 equation:


Simplifying
x = 0.0216 + 0.42x + x2

Solving
x = 0.0216 + 0.42x + x2

Solving for variable 'x'.

Reorder the terms:
-0.0216 + x + -0.42x + -1x2 = 0.0216 + 0.42x + x2 + -0.0216 + -0.42x + -1x2

Combine like terms: x + -0.42x = 0.58x
-0.0216 + 0.58x + -1x2 = 0.0216 + 0.42x + x2 + -0.0216 + -0.42x + -1x2

Reorder the terms:
-0.0216 + 0.58x + -1x2 = 0.0216 + -0.0216 + 0.42x + -0.42x + x2 + -1x2

Combine like terms: 0.0216 + -0.0216 = 0.0000
-0.0216 + 0.58x + -1x2 = 0.0000 + 0.42x + -0.42x + x2 + -1x2
-0.0216 + 0.58x + -1x2 = 0.42x + -0.42x + x2 + -1x2

Combine like terms: 0.42x + -0.42x = 0.00
-0.0216 + 0.58x + -1x2 = 0.00 + x2 + -1x2
-0.0216 + 0.58x + -1x2 = x2 + -1x2

Combine like terms: x2 + -1x2 = 0
-0.0216 + 0.58x + -1x2 = 0

Begin completing the square.  Divide all terms by
-1 the coefficient of the squared term: 

Divide each side by '-1'.
0.0216 + -0.58x + x2 = 0

Move the constant term to the right:

Add '-0.0216' to each side of the equation.
0.0216 + -0.58x + -0.0216 + x2 = 0 + -0.0216

Reorder the terms:
0.0216 + -0.0216 + -0.58x + x2 = 0 + -0.0216

Combine like terms: 0.0216 + -0.0216 = 0.0000
0.0000 + -0.58x + x2 = 0 + -0.0216
-0.58x + x2 = 0 + -0.0216

Combine like terms: 0 + -0.0216 = -0.0216
-0.58x + x2 = -0.0216

The x term is -0.58x.  Take half its coefficient (-0.29).
Square it (0.0841) and add it to both sides.

Add '0.0841' to each side of the equation.
-0.58x + 0.0841 + x2 = -0.0216 + 0.0841

Reorder the terms:
0.0841 + -0.58x + x2 = -0.0216 + 0.0841

Combine like terms: -0.0216 + 0.0841 = 0.0625
0.0841 + -0.58x + x2 = 0.0625

Factor a perfect square on the left side:
(x + -0.29)(x + -0.29) = 0.0625

Calculate the square root of the right side: 0.25

Break this problem into two subproblems by setting 
(x + -0.29) equal to 0.25 and -0.25.

Subproblem 1

x + -0.29 = 0.25 Simplifying x + -0.29 = 0.25 Reorder the terms: -0.29 + x = 0.25 Solving -0.29 + x = 0.25 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '0.29' to each side of the equation. -0.29 + 0.29 + x = 0.25 + 0.29 Combine like terms: -0.29 + 0.29 = 0.00 0.00 + x = 0.25 + 0.29 x = 0.25 + 0.29 Combine like terms: 0.25 + 0.29 = 0.54 x = 0.54 Simplifying x = 0.54

Subproblem 2

x + -0.29 = -0.25 Simplifying x + -0.29 = -0.25 Reorder the terms: -0.29 + x = -0.25 Solving -0.29 + x = -0.25 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '0.29' to each side of the equation. -0.29 + 0.29 + x = -0.25 + 0.29 Combine like terms: -0.29 + 0.29 = 0.00 0.00 + x = -0.25 + 0.29 x = -0.25 + 0.29 Combine like terms: -0.25 + 0.29 = 0.04 x = 0.04 Simplifying x = 0.04

Solution

The solution to the problem is based on the solutions from the subproblems. x = {0.54, 0.04}

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