Ask
your own question, for FREE!
Mathematics
40 Online
Find f(a + h) - f(a) for the function. Simplify your answer. f(x)=x^2-9x+3. I'm not exactly sure how to go about this...
Still Need Help?
Join the QuestionCove community and study together with friends!
first understand what \[f(a+h)\] means. it means replace x everywhere you see it by \[a+h\] so you get \[f(a+h)=(a+h)^2-9(a+h)+3\]
and of course \[f(a)=a^2-9a+3\]
so \[f(a+h)-f(a)=(a+h)^2-9(a+h)+3-(a^2-9a+3)\] and it is algebra from here on in
a bunch of algebra in fact \[a^2+2ah+h^2-9a-9h+3-a^2+9a-3\] now the usual miracle occurs, everything without an h in it goes away and you get \[2ah-9h+h^2\]
I see now. I was forgetting how to start this type of problem, but right after your first post I realized what I had to do. Thanks a ton!
Can't find your answer?
Make a FREE account and ask your own questions, OR help others and earn volunteer hours!
Join our real-time social learning platform and learn together with your friends!
Join our real-time social learning platform and learn together with your friends!
Latest Questions
XShawtyX:
Helpud83dude4f All this graphing shi hurts my head like how tf do u do this????
Jasonisyours:
What were the key causes of the French Revolution in 1789?
brianagatica14:
A phone company charges $2 for the first five minutes of a phone call and 30 cents per minute thereafter.
PureSoulless:
Why is the word "Pedophile" always censored in yt vids?
CherryLover:
not sure if ya'll hear of this but last year there was this girl and her name is Aubreigh Wyatt and she was bullied by a group of people and they hated her
ctomk3743:
It's another song I had in mind (please no negative comments) I walk through the rain at night as the wind blows hard and the rain pours down on me.
2 hours ago
1 Reply
1 Medal
2 hours ago
2 Replies
4 Medals
47 minutes ago
5 Replies
3 Medals
23 hours ago
3 Replies
0 Medals
1 hour ago
41 Replies
3 Medals
1 day ago
8 Replies
7 Medals