Question

evaluate the following using suitable:


(i) (998)³​

Answer 1

Answer:

see the explanation below

Step-by-step explanation:

(998)

3

=(1000−2)

3

Suitable identities is (x−y)

3

=x

3

−3x

2

y+3xy

2

−y

3

∴(1000−2)

3

=(1000)

3

−3(1000)

2

(2)+3(1000)(2)

2

−(2)

3

=1000000000−6000000+12000−8=994011992