Question

can any one help
$if \: a \: = 5 \: \: \: \: - \ 4 \sqrt{6} \: then \: find \: the \: value \: of \: \sqrt{a} \frac{ - 1}{ \sqrt{a} } \: and \: {a}^{2} \frac{1}{ {a}^{2} }$
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Answer 1

don't know dude???

sorry