Question

7. If x^2+1/x^2=3, find the value of x+1/x.


please help me this question plz!!!​

Answer 1

Answer:

x^2+1/x^2=3

=> (x+1/x)^2-2.x.1/x=3

=> (x+1/x)^2-2=3

=> (x+1/x)^2=3+2

=> (x+1/x)^2=5

=> x+1/x=√5