Question

a+1/a=3
find the value of (a square + 1/a square)

Answer 1

square both sides
and apply (a+b)^2=a^2+b^2+2ab...u will get

a^2+b^2=9-2=7


hope u like

Answer 2

(a+1/a)=3
on squaring both the sides,
(a+1/a)^2=3^2
a^2+1/a^2+2*a*1/a=9
a^2+1/a^2+2=9
a^2+1/a^2=9-2
a^2+1/a^2=7

hope it helps.