Posted by tommy on Thursday, October 29, 2009 at 6:25pm.
what is 4i squared? 5i?
√-16
= √-1√16
= 4i
now you do the others the same way.
8
sqrt(-16)=sqrt(-1)sqrt(16)=i sqrt(16)=4i
sqrt(-25)=sqrt(-1)sqrt(25)=i sqrt(25)=5i
I think you can see it now. Just remember i=sqrt(-1). And don't forget your properties of sq-roots.
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