book Maths Puzzle Numerical Ability

Can you show me how to plot y=x+2 on a graph

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book Other Question

Add x/x-2 + 1-5x/x^2 -8x+12 Please tell me if the answer is correct on the following problems. If not, would you tell the answer so I can see what I did wrong.
a. 3x^2-x^2-2x+3 divided by x+2
I came up