Expand each of the following, using suitable identities:
(i)
(ii)
(iii)
(iv)
(v)
(vi)
Solution (i)
We can use an identity,
(1)
Here,
and
, putting these values in (1), we get
Solution (ii)
We can use an identity,
(1)
Here,
and
, putting these values in (1), we get
Solution (iii)
We can use an identity,
(1)
Here,
and
, putting these values in (1), we get
Solution (iv)
We can use an identity,
(1)
Here,
and
, putting these values in (1), we get
Solution (v)
We can use an identity,
(1)
Here,
and
, putting these values in (1), we get
Solution (vi)
We can use an identity,
(1)
Here,
and
, putting these values in (1), we get
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