help!
A polynomial function can be written as (x - 1)(x - 4)(x + 7). What are the x-intercepts of the graph of this function?

a. (1, 0), (4, 0), (7, 0)
b. (-1, 0), (-4, 0), (-7, 0)
c. (1, 0), (4, 0), (-7, 0)
d. (-1, 0), (-4, 0), (7, 0)

Question

help!
A polynomial function can be written as (x - 1)(x - 4)(x + 7). What are the x-intercepts of the graph of this function?

a. (1, 0), (4, 0), (7, 0) 
b. (-1, 0), (-4, 0), (-7, 0) 
c. (1, 0), (4, 0), (-7, 0) 
d. (-1, 0), (-4, 0), (7, 0)

anonymous · Answer

Set it equal to 0. What do you know about quadratic equations in their factored form that allow you to get the roots? How is that applied here?

ikram002p · Answer

to find the x-intercepts that mean y = 0
y=(x - 1)(x - 4)(x + 7)
0=(x - 1)(x - 4)(x + 7)
so we conclude that on of the multible should be 0
0= x - 1 
or
0= x - 4 
or
0= x +7 
find x values in the three cases.