Question

If x2+1/x2=23 find the value ofx2-1/x2

Answer 1

Answer:

-21

Step-by-step explanation:

x²+1/x²=23

x²+1 =23x²

1=23x²-x²

1=22x²

x²=1/22

now put value of x² in x²-1/x²

which gives ans. -21

REFER THE PIC.