Question

{2p-q)2+8pq=(2p+q)2 show that

Answer 1

4p-q+8pq=4p+q
4p-q-(4p+q)=8pq
4p-q-4p-q=8pq
8(2p+2q)=8pq
16p+16q=8pq
16p-8pq+16q=0
8(2p-pq+2q)=0