5.5 Zeroes of Polynomial Functions (In-class Assignment) Score: 9/15 Answered: 3/5 Progress saved Done • Question 3 0/3 pts 3 4 Details Use the given polynomial to answer the following questions. $y = x^3 + 3x^2 - 7x - 21$ a) Record the exact zeros below. Rounded numbers will not be accepted. Use a comma to separate the zeros if the polynomial has more than one. b) Record the factored form of the polynomial function below. $y =$ Question Help: Message instructor Submit Question
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We can factor the polynomial by grouping: $x^2(x+3) - 7(x+3) = (x^2 - 7)(x+3) = 0$ The zeros are $x = \pm \sqrt{7}$ and $x = -3$. Show more…
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