Question

Use property to evaluate : 9³ - 5³ - 4³

Answer 1

Property is if a + b + c = 0 then a³ + b³ + c³ = 3abc
a = 9, b = -5, c = -4
9³ - 5³ - 4³ = 9³ + (-5)³ + (-4)³ = 3(9)(-5)(-4) = 540