Question

11. If a-1/a=8anda≠O;find:a²-1/a²​

Answer 1

Answer:

Step-by-step explanation:

(a-1)/a=8

therefore

8a=a-1

so,7a=-1

a=-1/7

now

(a^2-1)/a^2=(1/7^2-1)/(1/7^2)

=(1/49-1)/1/49

=-48/49/1/49

=-48