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Question

The value of (2+2)(22) is _____.
  1. 0

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Solution

The correct option is A 0
A common tendency to solve this question is to apply the algebraic identity (a2b2)=(a+b)(ab). But by observation, we can see that (22), which is one of the factors, will result in 0, thus making the final value of the whole expression as 0 i.e.
(2+2)(22)
=(2+2)×(0)
=0

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