Question

what is the value of 52³-32³-20³ ? (using identity )

Answer 1

Here, 52 + (-32)+(-20) = 0
now, we know if a+b+c=0 then, a^3+b^3+c^3 = 3abc
now, 52^3+(-32)^3+(-20)^3
= 3 ×52×-32×-20
= 3×52×640
= 99840 ans...
I hope you understand....