Question

Evaluate using an identity 100cube - 81cube - 19cube.
.

Answer 1

Answer:

100³-81³-19³

=461700

Step-by-step explanation:

let

a=100

b=81

c=19

if

a+b+c=0

then

a³+b³+c³=3abc

now

100-81-19

=100-100

=0

therefore

100³-81³-19³

=3*100*81*19

=461700