Question

. 2 √−9 √−16 is equal to (a) 24 (b) -24 (c) 48 (d) -48 ​

Answer 1

Your question is not correct.

.2√-9√-16 is not a number.

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Answer 2

Answer:

(b) -24

Step-by-step explanation:

√-1 = i

Therefore, 2 x √(-1 x 9) x √(-1 x 16)

              = 2 x i x √9 x i x √16

              = 2 x 3 x 4 x i^2

              = 24 x (-1)               ...( since,i x i = i^2 = √-1 x √-1 = -1)

              = -24.

Therefore the answer is (b) -24.