exam Maths Puzzle Numerical Ability

I need help trying to solve this problem.
__3_ -2
12+x-x^2 x^2-9

Sure hope I did this right. This problem cam from the 10th Edition of Introductory to Algebra by Mar

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exam Other Question

The total value of a house and a lot is $68,000. If the ratio of the value of the house to the value of the lot is 7 to 1, find the value of the house.
3. What type of solution do you get for quadratic equations where D < 0? Give reasons for your answer. Also provide an example of such a quadratic equation and find the solution of the equation.