Question

if 2x-1/x=4 show that x sq +1/ x sq =5​

Answer 1

Answer:

-15

Step-by-step explanation:

We have ,x- 1/x=5

Then x-1=5x

5x-x=-1

4x=-1

X=-1/4

Now we have the value of x

X^2-1/x^2=(-1/4)^2-1/(-1/4)^2=(1/16)-1/( 1/16)

(-15/16) × 16/1= -15