x^3+21x^2+x+2i=0

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Solution for x^3+21x^2+x+2i=0 equation:


Simplifying
x3 + 21x2 + x + 2i = 0

Reorder the terms:
2i + x + 21x2 + x3 = 0

Solving
2i + x + 21x2 + x3 = 0

Solving for variable 'i'.

Move all terms containing i to the left, all other terms to the right.

Add '-1x' to each side of the equation.
2i + x + 21x2 + -1x + x3 = 0 + -1x

Reorder the terms:
2i + x + -1x + 21x2 + x3 = 0 + -1x

Combine like terms: x + -1x = 0
2i + 0 + 21x2 + x3 = 0 + -1x
2i + 21x2 + x3 = 0 + -1x
Remove the zero:
2i + 21x2 + x3 = -1x

Add '-21x2' to each side of the equation.
2i + 21x2 + -21x2 + x3 = -1x + -21x2

Combine like terms: 21x2 + -21x2 = 0
2i + 0 + x3 = -1x + -21x2
2i + x3 = -1x + -21x2

Add '-1x3' to each side of the equation.
2i + x3 + -1x3 = -1x + -21x2 + -1x3

Combine like terms: x3 + -1x3 = 0
2i + 0 = -1x + -21x2 + -1x3
2i = -1x + -21x2 + -1x3

Divide each side by '2'.
i = -0.5x + -10.5x2 + -0.5x3

Simplifying
i = -0.5x + -10.5x2 + -0.5x3

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