Evalute 992 square with identities
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(992)^2
= (1000-8)^2
=1000^2+8^2-2*1000"8
=1000000+64-64000
=984064
= (1000-8)^2
=1000^2+8^2-2*1000"8
=1000000+64-64000
=984064
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