a = 2, b = -3 হলে, 16a2 + 24ab + 9b2 এর মান কত?

A 1

B -1

C 5

D -6

Solution

Correct Answer: Option A

16a2 + 24ab + 9b2 
= 16(2)2 + 24(2)(-3) + 9(-3)2
= 16(4) + 24(2)(-3) + 9(9)
= 64 + 24(-6) + 81
= 64 - 144 + 81
= 1

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