exam Maths Puzzle Numerical Ability

how do i figure out the solution for: (3√-7)(2√-8)?? Thank you for any help

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exam Other Question

Find the two consecutive integers that each is between.

a. sqrt of 175
b. sqrt of 30?????

Thank you for you help and support.
P=44 units,x+6 (side) x+6 (bottom)

This is my Square Equation

Any help would be greatly appreciated:)