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Home > A2C > Chapter 9 > Lesson 9.1.1 > Problem 9-20

9-20.
  1. Find the roots (the solutions when y = 0) of each of the following polynomial functions. Homework Help ✎

    1. y = x2 − 6x + 8

    2. f(x) = x2 − 6x + 9

    3. y = x3 − 4x

Factor the right side and use the Zero Product Property.

x = 2, x = 4

See part (a).

x = 3

See part (a).

x is a common factor.