Simplify the following expression into the form a+bi where a and b are rational numbers

Mathematics

1 answer:

hoa [83]3 years ago

7 0

- 28 - 40i

note that i² = (√-1)² = - 1

expand product of factors using FOIL

= - 6 - 6i - 14i - 14i² - 20i + 36i²

= - 6 - 6i - 14i + 14 - 20i - 36

= - 28 - 40i

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