190k views
0 votes
If x+1/x=4,find the value of (x-1/x)^2

User Shosti
by
8.3k points

1 Answer

3 votes

\left(x-(1)/(x)\right)^2=\\ x^2-2+(1)/(x^2)=\\ x^2+2+(1)/(x^2)-4=\\ \left(x+(1)/(x)\right)^2-4=\\ 4^2-4=16-4=12
User CapBBeard
by
8.5k points

No related questions found

Welcome to QAmmunity.org, where you can ask questions and receive answers from other members of our community.

9.4m questions

12.2m answers

Categories