$\"\"$

The complex number is $\"\"$ .

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

The original complex number is $\"\"$ .

Substitute the value $\"\"$ .

$\"\"$

Product of two negative signs is positive.

$\"\"$ .

$\"\"$

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