Question

evaluate the following by using identities
the question is in the attachment photo!! I need I need the answer with every steps for each! ❣❣❣❤❤❤✍✍✍✍✍✍✍✍✍✍✍✍✍

Answer 1

1.103 ki cube
we can also write it as (100+3) ki cube
(a+b) ki cube ka formula apply kro.
2.99 ki cube =(100-1)ki cube
apply formula ,,
=1000000-1-30000+300
=1000300-30001
=970199
3.1001={1000+1} ki cube
=1000000+1+30000+300
=1030301

Answer 2

2. (103)^3

=(100+3)^3

=by using the identity (a+b)^3=a^3+b^3+3a^2b+3ab^2

=1092727 ans

3.(99)^3

=(100-1)^3

=970299 ans

4. (1001)^3

=(1000+1)^3

=1000033001 ans

using the same identity in the three question