Question

(x^6-11x^3+30)/(x^3-6)

Answer 1

x^3 +5

Answer 2

here, first substitue x^3=t
u hav a factorisable quadratic equation in the numerator.
it factors to : (t+5)(t-6) and so (t-6) get cancelled...u hav t+5 i.e. x^3+5