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

Question

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

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Emery 2 weeks 2021-09-10T10:33:56+00:00 2 Answers 0 views 0

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    0
    2021-09-10T10:35:22+00:00

     \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!!!!

    0
    2021-09-10T10:35:31+00:00

    Answer:

    hey mate your answer was very helpful to me . when I get the option of Mark as brainlest answer . then I will mark as brainlest answer ok

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18:9+8+9*3-7:3-1*13 = ? ( )