Squaring a combination of powers of the imaginary unit

Squaring a combination of powers of the imaginary unit

IB Year 6 | Grade 12

It is given that \(\left[i^{31}-i^{-22}\right]^2=a+bi\) where \(a,\ b\in\mathbb{R}\). Find the values of \(a\) and \(b\).

Solution:

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Answer:\(a=0,\ b=-2\)

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