book Maths Puzzle Numerical Ability

Which of the following are the factors of x^3+3x^2?

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book Other Question

The sum of three integers is 25. The first integer is 4 times the sum of the second and third integer. The second is twice the opposite of the third. What are the integers? In constructing a golden section, if b=5, what is a? Give answer in three or four significant figures.