exam Maths Puzzle Numerical Ability

I need help adding: 3/x^2-16 + x+2/x^+8x+16. Thank you

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exam Other Question

3x - 6y = 9
x - 2y = 3
Again their is a graph with this.
Solve each of the following systems by graphing. how end behavior of polynomial functions can be determined by the degree and sign of the leading term?