Question

a²+1/a²=11 find a³-1/a³​

Answer 1

Step-by-step explanation:

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

=11-2=9

(a-1/a)=3 or -3

(a-1/a)^3=a^3-1/a^3-3(a-1/a)

a^3-1/a^3=(a-1/a)^3+3(a-1/a)

fora-1/a=3

a^3-1/a^3=27+9=36

for a-1/a=-3

a^3-1/a^3=-27-9=-36