SOLUTION: {{{sqrt(-r/5)sqrt(-20/r)}}}

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Question 119571This question is from textbook Algebra and Trigonometry Structure and Method Book 2
: sqrt%28-r%2F5%29sqrt%28-20%2Fr%29This question is from textbook Algebra and Trigonometry Structure and Method Book 2

Found 2 solutions by checkley71, jim_thompson5910:
Answer by checkley71(8403) About Me  (Show Source):
You can put this solution on YOUR website!
sqrt(-r/5)*sqrt(-20/r)
sqrt(20r/5r)
sqrt4=2 answer.

Answer by jim_thompson5910(28595) About Me  (Show Source):
You can put this solution on YOUR website!
sqrt%28-r%2F5%29sqrt%28-20%2Fr%29 Start with the given expression. Note: since r%3C%3E0 and we cannot take the square root of a negative number, we must make the restriction r%3C0


sqrt%28%28-r%2F5%29%28-20%2Fr%29%29 Combine the square roots.



sqrt%28%28-r%2F5%29%28-4%2A5%2Fr%29%29 Factor -20 into -4%2A5


sqrt%28%28-cross%28r%29%2Fcross%285%29%29%28-4%2Across%285%29%2Fcross%28r%29%29%29 Cancel like terms



sqrt%28%28-1%29%28-4%29%29 Simplify



sqrt%284%29 Multiply


2 Take the square root of 4 to get 2