Step 1 :

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Let the complex numbers are $\"\"$ and $\"\"$ , then

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The product of two complex numbers : $\"\"$ .

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The multiplication of the complex numbers is $\"\"$ .

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Let the complex numbers are $\"\"$ .

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$\"\"$

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$\"\"$

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$\"\"$

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$\"\"$

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Solution :

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The result is $\"\"$ .