x2 - 4x + 3 এবং x2 - 5x + 6 এর ল.সা.গু = কত?


A (x - 3) 

B

C (x - 1)(x - 2)(x - 3)  

D (x - 2)(x - 3)

Solution

Correct Answer: Option C

১ম রাশি = x2 - 4x + 3
             = x2 - 3x - x + 3
            = x(x - 3) - 1(x - 3)
            = (x - 3)(x - 1)
২য় রশি = x2  - 5x + 6
             = x2 - 2x - 3x + 6
              = x(x - 2) - 3(x - 2)
             = (x - 2)(x - 3)

নির্ণেয় ল.সা.গু = (x - 1)(x - 2)(x - 3)

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