Question

22.
If x= 2+5, then x2 + 1/x2
(A) 81
(B)
16
(C) 61
(D) 18​

Answer 1

Answer:

x=7

then

x2 + 1/x2

=49+1/49

=2401+1/49

=2402/49

49.02040

Answer 2

NONE OF THE OPTIONS ARE CORRECT

x2+1/x2

=(2+5)2+1/(2+5)2

a2+b2+2ab

=(4+25+20)+1/(4+25+20)

=49+1/49

=(2401+1)/49

=2402/49

=49.02040

THIS IS COMPLETELY DIFFERENT FROM OPTIONS

THANK YOU