1. : = = =
2. - : = - = - 2p * 2q = -4pq
3. : = =
4. : = = =
5. : ( - ) = - = - = -
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Verified answer
1.
:
=
=
= 
2. -
:
= -
= - 2p * 2q = -4pq
3.
:
=
= 
4.
:
=
=
= 
5.
: ( -
) = -
= -
= -