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Mathematics 21 Online
OpenStudy (liljj1421):

given the function rule f(x)=x^2-3x+2, what is the output of f(-2)? a. -8 b. 0 c. 4 d. 12

OpenStudy (anonymous):

(-2)^2 -3(-2) + 2 4 + 6 + 2 12 f(-2)=12 so the answer is d

OpenStudy (liljj1421):

I don't get it

OpenStudy (liljj1421):

@zoomiemoo

OpenStudy (anonymous):

for f(-2) you have to plug in -2 into all of the x's

OpenStudy (anonymous):

-2^ =4

OpenStudy (anonymous):

-2 * -3 =6

OpenStudy (anonymous):

so 4 + 6 + 2 = 12

OpenStudy (liljj1421):

y did you add 4 and 6

OpenStudy (anonymous):

because there are both positive

OpenStudy (anonymous):

two negatives make a positive

OpenStudy (liljj1421):

thank you

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