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# Maths Help!!

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1. I know (3√7)^2 = 63. But can someone explain how please
2. (Original post by thea_)
I know (3√7)^2 = 63. But can someone explain how please
so first you do 3 squared which is 9
then root 7 squared which is root 49
root 49 = 7
then all that is left in the bracket is 9 and 7
so you do 9 x 7 which = 63

hope this is right
3. (Original post by thea_)
I know (3√7)^2 = 63. But can someone explain how please
This is a very basic question and if you cannot do it, I would recommend you watch this video: -http://www.examsolutions.net/a-level-maths/edexcel/c1-tutorials/

Watch all the videos in the surd section.

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Updated: September 18, 2016
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