Question
Perform the indicated operations and write your answers in the form $a+b i,$ where $a$ and $b$ are real mombers.$$(\sqrt{5}-2 i)^{2}$$
Step 1
This is done by squaring the first term, then subtracting twice the product of the two terms, and finally adding the square of the second term. This is based on the formula $(a-b)^2 = a^2 - 2ab + b^2$. Show more…
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