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Find each product. Write answers in standard form. i(3-4i)(3+4i)

In Exercises 65–70, perform the indicated operation(s) and write the result in standard form. (4 - i)^2 - (1 + 2i)^2

Find each quotient. Write answers in standard form. -5 / i

Simplify each power of i. i^23

In Exercises 95–99, perform the indicated operations and write the result in standard form. 8/(1 + 2/i)

Work each problem. Show that √2/2 + √2/2 i is a square root of i.