using identities evaluate (i) 998² (ii) 92 × 108
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And as for the second one and is : -
(100-8)(100+8)
(a+b)(a-b)=a^2 - b^2
So now putting in values-
(100)^2 - (8)^2 = 10000-64
= 9936
(100-8)(100+8)
(a+b)(a-b)=a^2 - b^2
So now putting in values-
(100)^2 - (8)^2 = 10000-64
= 9936
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