Q2 of 157 Page 22

Using a suitable identity, find each of the following products:

(100 + 3) (100 – 3)

∵ (a2 – b2) = (a – b) × (a + b)


∴ (100 + 3) (100 – 3) = (100)2 – (3)2


⇒ (100 + 3) (100 – 3) = 10000 – 9 = 9991


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