x=0.4(x^2+1)

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Solution for x=0.4(x^2+1) equation:


Simplifying
x = 0.4(x2 + 1)

Reorder the terms:
x = 0.4(1 + x2)
x = (1 * 0.4 + x2 * 0.4)
x = (0.4 + 0.4x2)

Solving
x = 0.4 + 0.4x2

Solving for variable 'x'.

Reorder the terms:
-0.4 + x + -0.4x2 = 0.4 + 0.4x2 + -0.4 + -0.4x2

Reorder the terms:
-0.4 + x + -0.4x2 = 0.4 + -0.4 + 0.4x2 + -0.4x2

Combine like terms: 0.4 + -0.4 = 0.0
-0.4 + x + -0.4x2 = 0.0 + 0.4x2 + -0.4x2
-0.4 + x + -0.4x2 = 0.4x2 + -0.4x2

Combine like terms: 0.4x2 + -0.4x2 = 0.0
-0.4 + x + -0.4x2 = 0.0

Begin completing the square.  Divide all terms by
-0.4 the coefficient of the squared term: 

Divide each side by '-0.4'.
1 + -2.5x + x2 = 0

Move the constant term to the right:

Add '-1' to each side of the equation.
1 + -2.5x + -1 + x2 = 0 + -1

Reorder the terms:
1 + -1 + -2.5x + x2 = 0 + -1

Combine like terms: 1 + -1 = 0
0 + -2.5x + x2 = 0 + -1
-2.5x + x2 = 0 + -1

Combine like terms: 0 + -1 = -1
-2.5x + x2 = -1

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

Add '0.25' to each side of the equation.
-2.5x + 0.25 + x2 = -1 + 0.25

Reorder the terms:
0.25 + -2.5x + x2 = -1 + 0.25

Combine like terms: -1 + 0.25 = -0.75
0.25 + -2.5x + x2 = -0.75

Factor a perfect square on the left side:
(x + 0.5)(x + 0.5) = -0.75

Can't calculate square root of the right side.

The solution to this equation could not be determined.

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