Find the product of (−5−7i) and its conjugate.

Viira asked Dec 5, 2023

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Viira asked Dec 5, 2023

by Viira

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23 votes

Solution:

Given:

The conjugate of (-5 -7i) is (-5+7i)

Hence, the product is;

$\begin{gathered} (-5-7i)(-5+7i) \\ Expanding\text{ the bracket,} \\ =25-35i+35i+49 \\ =25+0+49 \\ =74 \end{gathered}$

Therefore, the product is 74.

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