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OpenStudy (anonymous):
If f(x) = -x^2-9x, find f(-4)
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OpenStudy (anonymous):
f(-4)=(-4)^2-9*(-4)=16+36=52
OpenStudy (anonymous):
wouldnt it be 20 because i got 20
OpenStudy (anonymous):
Yes that's right, I hadn't seen the minus sign in front of your x^2
OpenStudy (anonymous):
yay i was right! mind helping me in other problems i've got an algebra test tommorow
OpenStudy (anonymous):
Sure (I've got a math test tomorrow too haha)
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OpenStudy (anonymous):
really? wow! i'll post it in another post
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