Question

a+1/a=3 then a^2+1/a2=

Answer 1

a+1/a= 3. then a²+1/a²
then= (a+1/a)² = 3² ,formula = (a+b)²= a²+b²+2ab
then = a²+1/a²+2*a*1/a = 3²
then = a²+1/a²+2*1 = 9
then = a²+1/a² = 9-2
then = a²+1/a² = 7 ans

Answer 2

Answer:

Anser is

Step-by-step explanation:

a+1/a = 3

(a+1/a)=a^2+1/a^2+2

=> (3)^2 = a^2+1/a^2+2

=> 9 = a^2+1/a^2+2

=> a^2+1/a^2+2 = 9

=> a^2+1/a^2 = 7