Which Formulae?
Algebra
Level
2
To solve 1017 x 983, which of the following formulae will be useful.
a^2 - b^2
(a+b)^2
a^2 + b^2
(a x b)^2
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1 solution
1017 x 983 can also be written as (1000+17)(1000 - 17), which is (1000 x 1000) - (17 x 17).Therefore, the answer is a^2 - b^2.