Question

If x-1/x =4,then x2+1x2 =

(a) 23          (b)25          (c) 18   (d)  20​

Answer 1

Answer:

(a) 23     

Step-by-step explanation:

If x-1/x =4,then x2+1x2 =23

Answer 2

Answer:

x + 1/x = 4

Squaring both sides,

or

or

Hence, C