exam Maths Puzzle Numerical Ability

How would you perform the indicated operation and simplify for this problem?

5/x^2-2x/30/x^2-4

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exam Other Question

For the function y = 1 / (over) x-2

Give the y values for x = -1, 0, 1, 2, 3, 4.

Also, if you can please graph/curve that for me.
Multiply. (x - 10)(x + 9)

Thanks.