book Maths Puzzle Numerical Ability

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[3/(x-1)]+3 / [3/(x+1)]-3

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book Other Question

Hi I'm not sure if I picked the right topic but I am trying to solve the following system of linear inequalities graphically. The problem is
3x-y is less than or equl to 6
x is Let f(x)=2x^2 + 3x - 5. What is the value of f(-3)