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How to simplify this indices?

I kinda stuck on this question.how to simplify it? any help would be greatly appreciated
(edited 8 years ago)
unnamed (2).png12.7KB
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TeeEm
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Original post by thuvcasio
I kinda stuck on this question.unnamed (2).pnghow to simplify it? any help would be greatly appreciated


please post here

http://www.thestudentroom.co.uk/forumdisplay.php?f=38
Original post by thuvcasio
I kinda stuck on this question.unnamed (2).pnghow to simplify it? any help would be greatly appreciated


you can cancel out the 2x in the brackets, leaving you (16/25)^1/2 which equals to sqrt (16/25), then apply your indices rules to give sqrt 16 divided by sqrt 25, to give 4 divided by 5
Original post by thuvcasio
I kinda stuck on this question.unnamed (2).pnghow to simplify it? any help would be greatly appreciated


1/2 power is the same as square rooting the whole thing as it is in brackets. so √2√x√16 / √2√x√25
√16 = 4 √25= 5 and √2√x over √2√x cancel out so the answer is 4/5.

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