7+root 5 /7- root 5 = a+b root 5 find the value of a and b – InterviewSolution

1.	7+root 5 /7- root 5 = a+b root 5 find the value of a and b
Answer» -STEP EXPLANATION:AnswerWe have,7− 5 7+ 5 − 7+ 5 7− 5 =a+b 5 (7+ 5 )(7− 5 )(7+ 5 ) 2 −(7− 5 ) 2 =a+b 5 a+b 5 = (49−5)(49+5+14 5 )−(49+5−14 5 ) a+b 5 = 4428 5 a+b 5 = 117 5 THEREFORE,a=0,b= 117

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