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liq [111]
3 years ago
13

Perform the indicated operation and write the result in the form a+bi. -9i(-9i+4)+3(8+8i)

Mathematics
2 answers:
tatuchka [14]3 years ago
4 0

- 57 - 12i

distribute the parenthesis

= 81i² - 36i + 24 + 24i

[ note that i² = (√- 1 )² = - 1 ]

= - 81 - 36i + 24 + 24i ( collect like terms )

= - 57 - 12i



irina [24]3 years ago
3 0

Answer:

D^^

Step-by-step explanation:

Edge

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