$\"\"$

The standard form of the complex number is $\"\"$ , where $\"\"$ and $\"\"$ are real numbers.

The complex number is 2 and its cubic is $\"\"$ . $\"\"$

The standard form of complex number is $\"\"$ .

$\"\"$

The standard form of complex number is $\"\"$ .

The complex number is $\"\"$ and its cubic is $\"\"$ .

Apply algebraic formula: $\"\"$ .

$\"\"$ (Substitute $\"\"$ )

$\"\"$ (Simplify)

$\"\"$ ( $\"\"$ )

$\"\"$ (Simplify) $\"\"$

The standard form of complex number is $\"\"$ .