exam Maths Puzzle Numerical Ability

Suppose you are in the market for a new home and are interested in a new housing community under construction in a different city.
a) The sales representative informs you that the

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Roberto invested some money at 7%, and then invested $2000 more than twice this amount at 10%. His total annual income from the two investments was $3980. How much was invested at 10%? If F(x)= 3X to the 3rd power -6X to the 2nd power - x + 7, what is the value of f(2) + f(-2)?

This question is multiple choice, it is either A. -34, B. 0, C. 2, D. 7, E. 14