(Math) I need help with subtracting radicals!
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(Math) I need help with subtracting radicals!

[From: ] [author: ] [Date: 12-05-20] [Hit: ]
your answer is correct, you just have to go one more step.......
I'm studying for finals and can some tell me what im doing wrong? or is the given answer an error?

http://img9.imageshack.us/img9/5160/sdsd…

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y^14 is the square root of y^28.
your answer is correct, you just have to go one more step.
-3(x^9)(y^14)*sqrt(2y)
-3(x^9)*sqrt(y^28)*sqrt(2y)
-3(x^9)*sqrt(2y^29)
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