Question

(y-1/y)^3 = 729 Find y^3 - 1/y^3​

Answer 1

Answer:

Step-by-step explanation:If (y-1/y)^3=729 then y-1/y=9.

Now,y^3-1/y^3=9^3+3×9=729+27=756Ans

Answer 2

Answer:

hope I think this will be your answer