A student claims that -9i is the only imaginary root of a quadratic polynomial equation that has real coefficients.
a. What is the mistake in the student's claim? (2 points)
HINT: If there is another solution, what is it. If there is another solution, what
theorem is used to support your claim.
b. Write one possible factored polynomial that has the correct roots from part a by
filling in the missing parts to the polynomial below. (1 points)
C. Write the factored polynomial from part b in standard form. (1 points)

17. a researcher measures three variables, x, y, and z for each individual in a sample of n = 20. the pearson correlations for this sample are rxy = 0.6, rxz = 0.4, and ryz = 0.7. a. find the partial correlation between x and y, holding z constant. b. find the partial correlation between x and z, holding y constant. (hint: simply switch the labels for the variables y and z to correspond with the labels in the equation.) gravetter, frederick j. statistics for the behavioral sciences (p. 526). cengage learning. kindle edition.