Question

if a-1/a=(-4) then whar is the value of a^3-1/a^3​

Answer 1

Answer:

a-1/a=-4

-4a=a-1 (cross multiplication)

-4a-a=-1

-5a=-1

5a=1, a=1/5

now we have to find value of a^3-1/a^3.

((1/5)^3)-1 / (1/5)^3

0.008-1 / 0.008

-0.992 / 0.008

-124

hope it helps