Square root questions

1. What is the product of 4 square root of 6k * 3k square root of 3


2. What is the product of square root of t (8-3) square root of 5

3.What is the product of square root of 3 (2b square root of 49 -b)

4.What is the exact value of square root of 128/ 14

1)

4√(6k) * 3k√(3)

12k√(6k * 3)

12k√(18k)

12k√(9 * 2k)

12k√(9) √(2k)

12k * 3 √(2k)

36k√(2k)

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not clear the second

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√(3) ( 2b √(49 - b) )

2b√(3) √(49 - b) )

2b√( (49 - b) * 3 )

2b√(147 - 3b)

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√(128/ 14)

√(64/ 7)


(8/√(7))