Question

plz....... solve this question...... fast

Answer 1

(a-b)^2=a^2+b^2-2ab

similarly

(x-1/x)^2=x^2+(1/x^2)-2(x)(1/x)

5^2=x^2+(1/x^2)-2
x^2+1/x^2=25+2=27

(x^2+(1/x^2))^2=x^4+(1/x^4)+2(x^2)(1/x^2)
(27)^2=x^4+1/x^4+2
x^4+1/x^4=729-2
x^4+1/x^4=727

Answer 2

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