exam Maths Puzzle Numerical Ability

How do you simplify an rational expression like: 6-y/y^2-2y-24, whats the answer?

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exam Other Question

When simplifying a radical, is it necessary to take the absolute value of a result to indicate the pricipal root? Can you help me write an equation of the line having the following properties.
-passes through (-5,3) and is perpendicular to the x-axis