exam Maths Puzzle Numerical Ability

I am having a little trouble with radical inequalities!! For example: x+1/2x-3>2

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exam Other Question

For the function,

a) Give the y values for x = -1, 0, 1, 2, 3, 4.
Answer:

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b) Using these points, draw a curve.
Show graph here.
Factor : x^2 - 8xy + 12y^2 = (x -2y)(x -6y) Is this correct?