SOLUTION: I am having trouble completely solving this square root problem. I know the part √70,000 is 100√7 but not sure how to solve the part before it. Thank you for your help

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Question 589139: I am having trouble completely solving this square root problem. I know the part √70,000 is 100√7 but not sure how to solve the part before it. Thank you for your help.
-5√3(2√12+3√21)+√70,000

Answer by htmentor(1343)   (Show Source): You can put this solution on YOUR website!
I am having trouble completely solving this square root problem. I know the part √70,000 is 100√7 but not sure how to solve the part before it. Thank you for your help.
===========================

And
Multiplyig through and simplifying gives

Combine terms:


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