Question 795708
Rationalize the denominator.
{{{sqrt(1/5)*sqrt(16/35)}}}
= {{{sqrt(16/175)}}}
= {{{4sqrt(1/(7*25))}}}
= {{{(4/5)sqrt(1/7)}}}
= {{{(4/5)sqrt(7/49)}}}
= {{{(4/35)sqrt(7)}}}
= {{{4sqrt(7)/35}}}
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PS  There's no solving, just rationalization.