herchellann302
19.08.2019 •
Mathematics
What is the answer to the question above
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Ответ:
x=±9i
Step-by-step explanation:
x²+81=0
=>x²=-81
=>x=±√-81
x=±√81.(-1)
=>x=±√81 . √-1
=>x=±9i
Ответ: