exam Maths Puzzle Numerical Ability

Is this correct?

18x^5+15x^4-75x^3z^2

Answer? 3x^3(6x+5z)(x-5z)

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exam Other Question

find two consecutive even integhers such that the larger, added to eight times the smaller, equals 110 The apothems of two similar regular polygons are in the ratio 3:5. If the area of the larger polygon is 35m^2 find the area of the smaller polygon.

Can you tell me how to find t