17) Find Possible Positive, Negative or Imaginary Zeros. f(x)= x³ - 2x²-5x + 6 Count the number of sign changes. Positive Sign Changes = Find f(-x) = (-x)³ - 2(-x)² - 5(-x)+6 simplify Count the number of sign changes. Negative Sign Changes = Types of Positive Negative Imaginary (Pairs) Roots Roots Roots Since f(x) has 3 total roots.

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A: Given f(x)=x^4-2x^3+28x^2-4x+52, and that 1+5i is a zero of f(x).Find all the zeros.