exam Maths Puzzle Numerical Ability

Find the center, vertices and foci of the following ellipse:

(x + 3)^2/9 + (y + 1)^2/16 =1

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exam Other Question

simplify the following radical expression assume that all variables represent positive real numbers

/72x^3 can you please help me with this question. I have been confused for about three hours and I would really appreciate it if you would help me. thanks....

x^2 - 7x - 18 = 0