Using suitable identity find i 96² (ii) 97× 103
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(I.) (100-4) ²
(a-b)² = a²+b²-2ab
10000+16-800=9216
(II.) 97*103
(100-3) (100+3) (a+b)(a-b) = a²-b²
100²-3²
10000-9=9991
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