exam Maths Puzzle Numerical Ability

factor completly:

10x^3-31x+15

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exam Other Question

When you are plotting a point does the x or y come first? I'm still confused on this problem. It states to simplify.

(3x+3y+3)/9x ÷ (x^2+ 2xy+y^2- 1)/(x^4+ x^2 )

My instructor states - Once you get this in the form where you are m