If x+ 1/x=3 , find x square +1/x square i want answer fast plss, plss.
Answers
Answered by
2
Step-by-step explanation:
If x+(1/x)=5, what is the value of x^2+(1/x)^2? A. 21. B. 22. C. 23. D. 24. E. 27 ==>x^2+(1/x)^2=(x+1/x)^2-2x(1/ x)=25-2=23.
you can give the answer with the help of this
Answered by
1
Answer:
7
Step-by-step explanation:
x+1/x = 3
⇒(x+1/3)² = 3²
⇒x² + 1/x² + (2*x*1/x) = 9
⇒x² + 1/x² + 2= 9
⇒x² + 1/x² = 9-2
⇒x² + 1/x² = 7
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