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Simplify the following by rationalising the denominator.Plz answer this question plz plz. ​

Answer» ONG>Step-by-step explanation:

QUESTION:-

Solve the following by RATIONALIZING the denominator:-

\sf(i) \:  \dfrac{1}{3 \sqrt{2}  - 2 \sqrt{3} }  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \: (ii) \:  \dfrac{3 \sqrt{5} -  \sqrt{7}  }{3 \sqrt{3} +  \sqrt{2}  }

Solution:-

\sf(i) \: \: \dfrac{1}{3 \sqrt{2}  - 2 \sqrt{3} }

By rationalizing the denominator:-

\sf = \dfrac{1}{3 \sqrt{2} - 2 \sqrt{3}  }  \times   \dfrac{3 \sqrt{2}  + 2\sqrt{3} }{3 \sqrt{2}   +  2 \sqrt{3}}

\sf =  \dfrac{3 \sqrt{2}  + 2\sqrt{3} }{(3 \sqrt{2})^{2}  - (2 \sqrt{3})^{2}   }

\sf =  \dfrac{3 \sqrt{2}  + 2\sqrt{3} }{  }

\sf =  \dfrac{3 \sqrt{2}  + 2\sqrt{3} }{6 }

\underline{\boxed{\bf \leadsto \dfrac{3 \sqrt{2}  + 2\sqrt{3} }{6 }}}

________________________

(ii) \:  \dfrac{3 \sqrt{5} -  \sqrt{7}  }{3 \sqrt{3} +  \sqrt{2}  }

By rationalizing the denominator:-

\sf =  \dfrac{3 \sqrt{5} -  \sqrt{7}  }{3 \sqrt{3} +  \sqrt{2}  } \times  \dfrac{3 \sqrt{3} -  \sqrt{2}  }{3 \sqrt{3}  -  \sqrt{2} }

\sf  =   \dfrac{3 \sqrt{5}( 3 \sqrt{3} -  \sqrt{2}) -  \sqrt{7}(3 \sqrt{3}   -  \sqrt{2})   }{(3 \sqrt{3}  -  \sqrt{2} )(3 \sqrt{3} +  \sqrt{2})  }

\sf  =   \dfrac{3 \sqrt{5}( 3 \sqrt{3}) -  3 \sqrt{5} (\sqrt{2}) -  \sqrt{7}(3 \sqrt{3} )  -   \sqrt{7}( \sqrt{2})   }{(3 \sqrt{3})^{2}   -  (\sqrt{2} )^{2} }

\sf  =   \dfrac{9 \sqrt{15}-  3 \sqrt{10}  -  3 \sqrt{21}  -   \sqrt{14}   }{27  - 2 }

\sf  =   \dfrac{9 \sqrt{15}-  3 \sqrt{10}  -  3 \sqrt{21}  -   \sqrt{14}   }{25 }

\underline{\boxed{\bf \leadsto  \dfrac{9 \sqrt{15}-  3 \sqrt{10}  -  3 \sqrt{21}  -   \sqrt{14}   }{25 }  }}



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