Perform the indicated operation and write the result in the form a+bi. -9i(-9i+4)+3(8+8i)
2 answers:
- 57 - 12i
distribute the parenthesis
= 81i² - 36i + 24 + 24i
[ note that i² = (√- 1 )² = - 1 ]
= - 81 - 36i + 24 + 24i ( collect like terms )
= - 57 - 12i
Answer:
D^^
Step-by-step explanation:
Edge
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