Problem

What is an equivalent form of \( (3-7 i)^{2} \) ?

Answer

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Answer

\(-40 - 42i\)

Steps

Step 1 ：\((3-7i)^2\)

Step 2 ：\(3^2 + 2(3)(-7i) + (-7i)^2\)

Step 3 ：\(9 - 42i + 49i^2\)

Step 4 ：\(9 - 42i - 49\)

Step 5 ：\(-40 - 42i\)

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