Zeroes of a Quartic Polynomial

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Taught by mrbrianmclogan
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Meets NCTM Standards:
Lesson Summary:

In this lesson, we learn how to find the zeros of a quartic polynomial. Zeros of a polynomial occur when the function equals zero, and to find them, we need to factor the polynomial into linear factors. By factoring out x squared from 9x^4 - 25x^2, we get two possible values for x: 0 or plus or minus five thirds. These are the zeroes of the function.

Lesson Description:

Finding the zeros of the function 9x^4 - 25x^2

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Questions answered by this video:
  • What must you do to find the zeros of a function?
  • Having equated the function to zero, what is the next step?
  • If you know the values of x² how many values will x have?