SOLUTION: what is the product of 90 and 110

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Question 257121: what is the product of 90 and 110
Answer by rajagopalan(158) About Me  (Show Source):
You can put this solution on YOUR website!
Product of 90 and 110
90=100-10
110=100+10
(100+10)*(100-10)
100^2-10^2
10000-100
9900