যদি x=12 হয়, তবে নিচের কোনটির মান সর্বোচ্চ?

A x-3

B (x-7)(x-9)

C (x-7)(x-8)

D (x-5) (x-3)

Solution

Correct Answer: Option D

x=12 হলে,
x-3=12-3 = 9
(x-7)(x-9) = (12-7)(12-9) = 5.3 = 15
(x-7)(x-8) = (12-7)(12-8) = 5.4 = 20
(x-5) (x-3) = (12-5)(12-3) = 7.9 = 63 যা সর্বোচ্চ। 

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