exam Maths Puzzle Numerical Ability

Please help me solve this equation: (x-1)/(x+2) > 0

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exam Other Question

Can someone provide with examples of the following because i just dont' understand how to come up with what they are asking.

Write a problem dealing with radical expressions and This one has driven me crazy too. Please help!!
Evaluate if possible:
3sqrt -64 and 3sqrt64 and sqrt-64 and sqrt64

Thank you