exam Maths Puzzle Numerical Ability

how do i simplfy a radical ?

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exam Other Question

Solve: (2x^2 + 4x)/(x^2+4x-12) + (3x^2-2)/(x^2+2x-24) = (3x^3-4x)/(x^2-x-12) Can someone help me on this equation?

I need to complete the order pair so that each is a solution for the given equation:

3x + 4y = 12

pair 1 is (8/3,)
pair 2 is (0,)

Thanks,
Sher