Question

If a+b=-1/3 then prove that a^3+b^3 - ab=-1/27​

Answer 1

Answer:

Step-by-step explanation:

a+b=-1/3

(a+b)^3=a^3+b^3+3ab(a+b)

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

-1/27=a^3+b^3-ab

Proved