rationalise the denominator 2√2/7√2
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4√7 is your calculate answer
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we multiply root 2 on numerator and denominator.
then we get 2root2 into root 2 whole by 7root2 into root2.
this is equal to 2x2/7x2= 4/14=2/7
then we get 2root2 into root 2 whole by 7root2 into root2.
this is equal to 2x2/7x2= 4/14=2/7
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