q=4+2q^2

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Solution for q=4+2q^2 equation:


Simplifying
q = 4 + 2q2

Solving
q = 4 + 2q2

Solving for variable 'q'.

Reorder the terms:
-4 + q + -2q2 = 4 + 2q2 + -4 + -2q2

Reorder the terms:
-4 + q + -2q2 = 4 + -4 + 2q2 + -2q2

Combine like terms: 4 + -4 = 0
-4 + q + -2q2 = 0 + 2q2 + -2q2
-4 + q + -2q2 = 2q2 + -2q2

Combine like terms: 2q2 + -2q2 = 0
-4 + q + -2q2 = 0

Begin completing the square.  Divide all terms by
-2 the coefficient of the squared term: 

Divide each side by '-2'.
2 + -0.5q + q2 = 0

Move the constant term to the right:

Add '-2' to each side of the equation.
2 + -0.5q + -2 + q2 = 0 + -2

Reorder the terms:
2 + -2 + -0.5q + q2 = 0 + -2

Combine like terms: 2 + -2 = 0
0 + -0.5q + q2 = 0 + -2
-0.5q + q2 = 0 + -2

Combine like terms: 0 + -2 = -2
-0.5q + q2 = -2

The q term is q.  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.
-0.5q + 0.25 + q2 = -2 + 0.25

Reorder the terms:
0.25 + -0.5q + q2 = -2 + 0.25

Combine like terms: -2 + 0.25 = -1.75
0.25 + -0.5q + q2 = -1.75

Factor a perfect square on the left side:
(q + 0.5)(q + 0.5) = -1.75

Can't calculate square root of the right side.

The solution to this equation could not be determined.

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