10TH GRADE MATH HELP PLZ

Question

Write a polynomial function in standard form with zeros at −4, 1 and 1.

 

y=

Answer 1

The zeros are at x=-4, x=1 and x=1 again.  Write it in factored form:

 

y = (x+4)(x-1)(x-1)

 

Note that if x=-4, then the binomial (x+4)=(-4+4)=0.  When x=1, the the binomials (x-1)=(1-1)=0.  Multiply the factored form out and combine like-terms to put it into standard form.