SOLUTION: simplify: sqrt 4/5
a) 2 sqrt (5)
b) 2 sqrt (5) / 5
c) 2
b) sqrt (5)
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Question 316585: simplify: sqrt 4/5
a) 2 sqrt (5)
b) 2 sqrt (5) / 5
c) 2
b) sqrt (5)
Answer by texttutoring(324) (Show Source): You can put this solution on YOUR website!
sqrt(4/5)
=2 / sqrt5
But now you have to 'rationalize the denominator', by multiplying by sqrt(5)/sqrt(5):
2 / sqrt(5) * (sqrt(5)/sqrt(5))
= 2*sqrt(5)/5
The answer is b.
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