a2 3a 2 a 1 2 4a এর লঘিষ্ট রুপ, বীজগণিতীয় ভগ্নাংশ, গণিত

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Question:`(a^2 - 3a + 2)/(a + 1)^2 - 4a)` এর লঘিষ্ট রুপ কোনটি?

A `(a - 1)/(a - 2)` 
B `(a - 1)/(a - 2)` 
C `(a - 2)/(a + 1)` 
D `(a - 2)/(a - 1)`

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+ AnswerD

+ Explanation`(a^2 - 3a + 2)/((a + 1)^2 - 4a) = (a^2 - 2a - a + 2)/(a^2 + 2a + 1 - 4a)`

   `= (a(a - 2) - 1(a - 2))/(a^2 - 2a + 1) = ((a - 2) (a - 1))/(a - 1)^2`

                                                        `= (a - 2)/(a - 1)`

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