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x2-5x +1=0, find value of x2-1x2

x2-5x +1=0, find value of x2-1x2 Correct Answer 5

প্রশ্ন: x2−√5x+1=0 হলে x2−1x2এর মান কত?ব্যাখ্যা: x2 - √5x + 1 = 0 x2 + 1 = √5x x + 1/x = √5 [x দ্বারা ভাগ করে] (x + 1/x) 2 = (√5)2 (x - 1/x)2 + 4*x*1/x = 5 (x - 1/x)2 = 5 - 4 = 1 x - 1/x = 1 [বর্গমূল করে ] এখন, x2 - 1/x2 = (x + 1/x) (x - 1/x) = √5*1 = √5

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