exam Maths Puzzle Numerical Ability

How would i simplify this .. The square root of p to the seventh?

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exam Other Question

expand and simplify the following expression: (x+5)^3 Please help!
The ellipse:
(x^2/9)+(y^2/16) = 1 is which of the following?
1. a vertical ellipse with foci at (0,+or- sqrt. 7)
2. a horizontal ellipse with foci at (+or- sqrt. 7