SOLUTION: What is the answer to 7√2-2√8?

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Question 601222: What is the answer to 7√2-2√8?
Answer by jim_thompson5910(35256) About Me  (Show Source):
You can put this solution on YOUR website!
7√2-2√8

7√2-2√(4*2)

7√2-2√4*√2

7√2-2*2*√2

7√2-4*√2

3√2

So 7√2-2√8 = 3√2