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a.=(120+3)sq.
=using (a+b)whole sq.
as
(120)sq.+(3)sq.+2(120)(3)
=14400+9+720
15129
a.=(120+3)sq.
=using (a+b)whole sq.
as
(120)sq.+(3)sq.+2(120)(3)
=14400+9+720
15129
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