Find the value of each of the following using the short-cut method: (68) 3

Find the value of each of the following using the short-cut method:
(68)³

Let’s take,

a = 6 and

b = 8

So, by using the formula,

We have a³+3a²b+3ab²+b³

36

X 6

36

X 24

64

X 18

64

X 8

216

+98

864

+120

1152

+51

512

314

984

1203

By taking the highlighted digits only,

We get;

؞(68)³ = 314432

3