Question

if x-1byx=5,find xsquare +1by xsquare​

Answer 1

Answer:

X- 1/X  =5 THEN

value of  $x^{2} + \frac{1}{x^{2} }$ is

Step-by-step explanation:

sol: -  for this question we use identity of  $(a-b)^{2} =a^{2} - 2 a b +b^{2}$

where as  a= x and b =1/x

( x-  1/x )^2 = x^2  -2 x * 1/x + (1/x)^2

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

25 +2  = x ^2 + (1/x)^2

27 =x ^2  +  (1/x)^2