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OpenStudy (gahm8684):
A polynomial function can be written as (x - 2)(x - 3)(x + 5). What are the x-intercepts of the graph of this function?
(2, 0), (3, 0), (-5, 0)
(-2, 0), (-3, 0), (5, 0)
(2, 0), (3, 0), (5, 0)
(-2, 0), (-3, 0), (-5, 0)
OpenStudy (gahm8684):
i think is b
OpenStudy (gahm8684):
@JoannaBlackwelder
OpenStudy (joannablackwelder):
Close. It looks like a to me. 2-2 =0 for example.
OpenStudy (gahm8684):
what do you mean *-*
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OpenStudy (joannablackwelder):
You need for each set of parentheses to be 0.
OpenStudy (gahm8684):
then what do i do
OpenStudy (joannablackwelder):
To find the x-intercepts.
OpenStudy (joannablackwelder):
Plug in 2 for the first x.
OpenStudy (gahm8684):
(2-2)=0
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OpenStudy (joannablackwelder):
Since 2-2 equals zero, what ever the other 2 numbers turn out to be, 0 times anything is 0. So, the function is 0.
OpenStudy (joannablackwelder):
Where y is 0 is an x-intercept.
OpenStudy (gahm8684):
what do you mean?
OpenStudy (joannablackwelder):
y=(x-2)(x-3)(x+5)
OpenStudy (joannablackwelder):
That is the function.
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OpenStudy (gahm8684):
yeah but then whats the answer i dont get it
OpenStudy (joannablackwelder):
The answer is the values that make each set of parentheses 0.
OpenStudy (joannablackwelder):
Or A
OpenStudy (gahm8684):
ohhhhh now i get it
OpenStudy (gahm8684):
thanks man
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