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zubka84 [21]
4 years ago
14

Please help! Is -9i right?

Mathematics
1 answer:
mixas84 [53]4 years ago
8 0
If a + bi is a root of a function, then a - bi is also a root of the function.
 When we have 9i, that makes a = 0 and b = 9 
If 9i is a root of f(x) then 0 - 9i, or -9i is also a root of f(x)  -9i is correct!

Hope this helps! If you have any other questions or would like further explanation just let me know! :)
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