Question

If f(x)=5x^2-x+2
Then, f(x+h)-f(x)/h =?

Answer 1

what did u get f(x+h) as ?

Answer 2

I'm stuck at 5(x+h)^2-(x+h)+2

Answer 3

I dont know what to do with the 5(x+h)^2

Answer 4

\( (a+b)^2 = a^2+2ab+b^2 \)

Answer 5

and then multiply them all by 5??

Answer 6

yes!

Answer 7

the answer i got was wrong

Answer 8

i got 5x^2+10xh+5h^2-x-h+2

Answer 9

is that part right?

Answer 10

thats correct :)
carry on

Answer 11

5x^2+10x+5h-x+2

Answer 12

nopes, its not -f(h) its
-f(x)

Answer 13

\(f(x+h) = 5 (x+h)^2 = 5 x^2 + 10xh +5h^2 -x-h+2\)

\( f(x) = 5x^2-x+2 \)

subtract them!

Answer 14

okay i got 10xh+5h^2-h

Answer 15

oh wait i got the answer. i put in a sign wrong

Answer 16

Thank you!

Answer 17

welcome ^_^