Finding Zeros of Polynomials

Finding Zeros of a Function Lesson

Multiple Select

Identify all of the locations where the function crosses or touches the x axis.

• $$x=5$$

• $$x=-3$$

• $$x=2$$

• $$All\ of\ them$$

Multiple Choice

Which of the following is not a zero of the function

• $$x=-3$$

• $$x=-6$$

• $$x=3$$

Multiple Select

Check all that are zeros of the function

• $$-100$$  

• $$-3$$  

• $$-2$$  

• $$2$$  

• $$4$$  

Finding Zeros From a Function or it's Factored Form (DESMOS)

• Type either the function, equation, or factored form into Desmos

• Move cursor to points where the graph crosses the x axis

Multiple Select

Identify the zeros for the function

$$f\left(x\right)=x^3-6x^2+4x+4$$  

• $$x=-1$$  

• $$x=-.534$$  

• $$x=1.483$$  

• $$x=3.63$$  

• $$x=5.051$$  

Poll

Find one of the zeros for

$$f\left(x\right)=\left(2x-3\right)\left(x+4\right)$$  

• $$x=\frac{2}{3}$$  

• $$x=-4$$  

Multiple Choice

Which is NOT a zero of the function

$$f\left(x\right)=-3x^4-5x^3-x^2+x$$  ?

• $$x=-1$$  

• $$x=0$$  

• $$x=.333$$