Question

If a + b = 6 and a cube + b cube = 72 , then find the value of ab .

Answer 1

a+b=6
a cube +b cube=72
let a be 4 and b be 2
then 4cube+2cube=72
therefore ab=4*2=8

Answer 2

I hope this will help u
ab= 2×4=8
or
ab=12×-6= -72