r^4-i*r^3-8*r+8=0

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Solution for r^4-i*r^3-8*r+8=0 equation:


Simplifying
r4 + -1i * r3 + -8r + 8 = 0

Multiply i * r3
r4 + -1ir3 + -8r + 8 = 0

Reorder the terms:
8 + -1ir3 + -8r + r4 = 0

Solving
8 + -1ir3 + -8r + r4 = 0

Solving for variable 'i'.

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

Add '-8' to each side of the equation.
8 + -1ir3 + -8r + -8 + r4 = 0 + -8

Reorder the terms:
8 + -8 + -1ir3 + -8r + r4 = 0 + -8

Combine like terms: 8 + -8 = 0
0 + -1ir3 + -8r + r4 = 0 + -8
-1ir3 + -8r + r4 = 0 + -8

Combine like terms: 0 + -8 = -8
-1ir3 + -8r + r4 = -8

Add '8r' to each side of the equation.
-1ir3 + -8r + 8r + r4 = -8 + 8r

Combine like terms: -8r + 8r = 0
-1ir3 + 0 + r4 = -8 + 8r
-1ir3 + r4 = -8 + 8r

Add '-1r4' to each side of the equation.
-1ir3 + r4 + -1r4 = -8 + 8r + -1r4

Combine like terms: r4 + -1r4 = 0
-1ir3 + 0 = -8 + 8r + -1r4
-1ir3 = -8 + 8r + -1r4

Divide each side by '-1r3'.
i = 8r-3 + -8r-2 + r

Simplifying
i = 8r-3 + -8r-2 + r

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