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"Complex" numbers share many properties with the real numbers. In fact, complex numbers include all the real numbers, so you know lots of them already. Such an overachiever.

True or False:

For complex numbers \(a\) and \(b\),

\[ |a| + |b| = |a+b|. \]

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Evaluate

\[ i \times ( -i) . \]

**Note**: \(i \) is the imaginary unit, where \(i^2=-1\).

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For any complex number \(z\), which of the following must be equal to

"the real part of the imaginary part of \(z\)"?

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Which of the following is equal to

\[ \frac{ 1 + i } { 1 - i }? \]

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Are real numbers also complex numbers?

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