Math, asked by choudhariaishwarya77, 1 month ago

Please help me solving this question​

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Answers

Answered by Divyansh3943
0

Answer:

b

Step-by-step explanation:

b is right ans ok ok

you got mark me as brainliest

Answered by diwanamrmznu
2

Answer:

(A)

solution=>

  =  > \frac{5}{3 + 2 \sqrt{5} }  = \]{?}   \\

 =  \frac{5(3 - 2 \sqrt{5}) }{(3 + 2 \sqrt{5})(3 - 2 \sqrt{5})  }  \\  \\  =  \frac{15 - 10 \sqrt{5} }{3 {}^{2} -( 2 \sqrt{5}) {}^{2}   } \\  \\  =  \frac{15 - 10 \sqrt{5} }{  9-20}   \\  \\  =- ( \frac{ 10 \sqrt{5}-15 }{  11}) )

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formala uses

(a  +  b)(a - b) = a {}^{2}  - b {}^{2}

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I hope it helps you

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