exam Maths Puzzle Numerical Ability

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Write in lowest terms

25x^2-16/15X^3+7x^2-4x

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exam Other Question

HG and EF are bases, HI-height,

If HG=14, HI=2x+2, EF=4x+4, area=170, find x, HI, and EF. Given in an arithmetic series that the sum of the 9th term is 162 and the sum of the 12th term is 288. What is the series?