SOLUTION: can you help me simplify? 10sqrt7-sqrt28

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Question 81038: can you help me simplify?
10sqrt7-sqrt28
Found 2 solutions by funmath, tutor_paul:
Answer by funmath(2933) About Me  (Show Source):
You can put this solution on YOUR website!
simplify:
10sqrt7-sqrt28
10sqrt%287%29-sqrt%2828%29
10sqrt%287%29-sqrt%284%29sqrt%287%29
10sqrt%287%29-2sqrt%287%29
%2810-2%29sqrt%287%29
8sqrt%287%29
Happy Calculating!!!

Answer by tutor_paul(519) About Me  (Show Source):
You can put this solution on YOUR website!
10sqrt%287%29-sqrt%2828%29
You can rewrite the second term as follows:
10sqrt%287%29-sqrt%282%5E2%2A7%29
Since sqrt(2^2)=2, you can pull that term out from beneath the radical.
10sqrt%287%29-2sqrt%287%29
Now you can combine these:
highlight%288sqrt%287%29%29
Good Luck,
tutor_paul@yahoo.com