Zeros of Polynomials

What do "zeros" represent?

• something a polynomial can not be.

• the place that the polynomial crosses the x axis/ the x value that makes the whole equation equal to zero

• the place that the polynomial crosses the y axis/ the y value where x=0

• the number zero

Tags

CCSS.HSA.APR.B.2

CCSS.HSA.APR.B.3

CCSS.HSA.REI.D.11

To find zeroes of polynomials, we...

• say x=0

• make pancakes

• ask NASA

• set factors equal to zero

Tags

CCSS.HSA.APR.B.2

CCSS.HSA.APR.B.3

CCSS.HSA.REI.B.4

Note that: 

 $x^2+4x-5=\left(x+5\right)\left(x-1\right)$  
What are the factors of  $x^2+4x-5$  ?

Tags

CCSS.HSA.REI.B.4

CCSS.HSA.SSE.A.2

CCSS.HSA.SSE.B.3

For $\left(x+5\right)\left(x-1\right)=0$  , what is x equal to? (You can only select 1 answer!!!) 

• x=-5

• x=-4 x=1

• x=1

• x=1 and x=-5

• x=-1 and x=5

Tags

CCSS.HSA.REI.B.4

The degree of the function is...

• the size of it

• the number of terms

• the greatest exponent on the variable

• a BS in mathematics

The degree of a function is always equal to...

• the number of petals on a daisy

• the number of factors

• one less than the number of zeros

• the number of terms in the polynomial

A polynomial has 7 factors. What is the degree of that polynomial?

• 1

• 3

• 5

• 7

• 19

Tags

CCSS.HSA.APR.B.2

What is the degree of (x-1)(x+5)?

• 3

• 4

• 1

• 2

Tags

CCSS.HSA.APR.A.1

If a polynomial has 2 factors, it will have 2 zeros (or 1 zero with a multiplicity of 2).

• True

• False

Tags

CCSS.HSA.APR.B.2

CCSS.HSA.APR.B.3

How many zeros does $x^2+3x-4$  have? 

• 1

• 2

• 3

• 4

Tags

CCSS.HSA.APR.B.3

CCSS.HSA.REI.B.4