Question:a = - 1 হলে `a^2 + 2a + 1` নিচের কোনটির সমান? 

A 3 
B 2 
C 1 
D 0 

+ Answer
D 

+ Explanation
`a^2 + 2a + 1`  `= (a + 1)^2`

                             `= (- 1 + 1)^2 = 0`

+ Report

Irin Moni

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