Question

Root 5 + root 7 ÷ root 5 - root 7 + root 5 - root 7 ÷root 5 + root7 rationalise the denominator and simplify​

Answer 1

$\frac{ \sqrt{5} + \sqrt{7} }{ \sqrt{5} - \sqrt{7} } + \frac{ \sqrt{5} - \sqrt{7} }{ \sqrt{5} + \sqrt{7} } \\ \\ lets \: take \: lcm \: of \: denominators \\ \\ \frac{ {( \sqrt{5} + \sqrt{7} ) }^{2} + {( \sqrt{5} - \sqrt{7}) }^{2} }{( { \sqrt{5} ) }^{2} - {( \sqrt{7}) }^{2} } \\ \\ by \: using \: identities \\ \\ \frac{(5 + 2 \sqrt{35} + 7) + (5 - 2 \sqrt{35} + 7) }{5 - 7} \\ \\ \frac{24}{ - 2} \\ \\ - 12$

Hence denominators are rationalised and sum simplified....

Be Brainly!!!!

Answer 2

Answer:

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