Find using identity: 992
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99
2
=(100−1)
2
using (a−b)
2
=a
2
+b
2
−2ab
where a=100,b=1
=100
2
+1
2
−2×100×1
=10000+1−200=9801
Step-by-step explanation:
99
2
=(100−1)
2
using (a−b)
2
=a
2
+b
2
−2ab
where a=100,b=1
=100
2
+1
2
−2×100×1
=10000+1−200=9801
Answered by
0
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