exam Maths Puzzle Numerical Ability

Tutor could you help me please with this problem?

Determine whether the graph of y=x^3-2x is symmetric with respect to the x-axis, the y-axix, and/or the origin?

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exam Other Question

the perimeter of a swimming pool is 96m.Thw width is 3m more then half the length of the pool.Find the length of the brendth of the pool. a rectangle has a length of 6 cm. what is its width if its perimeter and area are the same number?