Posted by Hannah on .
For f(x) = 2x3 and g(x)= 2x^2 find,
a) (f + g)(x) = My answer is
2x^2 + 2x  3. Is this correct?
b) (f  g)(x) How would you do this?
c) (f X g)(2) I do not know what to do since the 2 is there.
Determine whether the graph of the following equation is symmetric with respect to the xaxis, the yaxis, and the origin.
y^2  x  49 = 0
For x axis y^2  x  9 = 0 is not the same as the first equation so it is not symmetrical to the xaxis. Correct?
For the yaxis y^2 + x  49 = 0 is not the same as the first equation so it is not symmetrical to the yaxis. Correct?
For the origin y^2 + x  49 = 0 is not the same as the first equation so itis not symmetrical to the origin either. Am I correct?

Math(Please, Please, help) 
Hannah,
Nevermind,I did not realize that my question was already answered.

Math(Please, Please, help) 
Reiny,
b) the same way you did a) , except ..
2x  3  (2x^2) =
(fg)(x) =  2x^2+ 2x  3
c) in this case you multiply,
(fxg)(x) = (2x3)(2x^2
then fxg(2) = (43)(8) = .... (I just replaced the x with 2)