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OpenStudy (anonymous):
How do you express 2√-81 in terms if i?
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OpenStudy (anonymous):
2i√81 since √-81 is an imaginary number.
OpenStudy (anonymous):
2*9i=18i
OpenStudy (anonymous):
Sorry it's 2(9i)
OpenStudy (anonymous):
You can actually multiply the 2 and 9i?
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