Question

161×161-61×61:find the value using identities

Answer 1

=a2-b2 (a+b) (a-b)
=(161)2 - (61)2
=(161+61) (161-61)
=(222) (100)
=22200

Answer 2

=a2-b2 (a+b) (a-b)

=(161)2 - (61)2

=(161+61) (161-61)

=(222) (100)

=22200

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