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,,find the rational numbers a&b such that2+5√7devided by2-5√7=a+√7b

Posted by Shameema Salam11 5 years, 2 months ago

CBSE > Class 09 > Mathematics

1 answers

Prime Gamer 5 years, 2 months ago

(2-5√7)(2-5√7)/(2+5√7)(2-5√7) (2-5√7)^2/2^2-(5√7)^2 4+175-20√7/4-175 179-20√7/-171 therfore, a=-179/171 and b=20/171

1Thank You

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CBSE > Class 09 > Mathematics