exam Maths Puzzle Numerical Ability

Perform the indicated operations:
2√[48] + 7√[12] �√[27]

I have no clue how to even start this one..

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exam Other Question

Multiply. Be sure to write each answer in simplest form.

5/21 X 14/25
Is this where I have to turn around the one fraction or is that dividing fractions? 9-(-2)(-7)=