যদি y = 5x2 - 2x এবং x = 3 হয়, তবে y = ?

A 39

B 45

C 18

D 35

Solution

Correct Answer: Option A

দেওয়া আছে, x = 3

এখন, y = 5x2 - 2x
           = 5.3- 2.3
           = 5.9 - 6
           = 45 - 6
           =39

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