Question

Given f (x) = x/(x2 - 4), find and simplify f (3x).

Answer 1

Just replace x by 3x wherever it occurs

Answer 2

Right, is it possible to simplify that after replacing x with 3x?

Answer 3

denominator is a diff of squares?

Answer 4

Is that a yes?

Answer 5

Is it possible to simplify that equation?

Answer 6

i got 0 after simplification !!

Answer 7

@CaptainMathNoob write out what you ended up with after replacing x with 3x. We can then advise you on whether or not it can be simplified further.

Answer 8

Seems like a pointless exercise, but ok. 3x/(3x^2-4)

Answer 9

@asnaseer done.

Answer 10

ok, looks like you made a small mistake there. you should replace x^2 with (3x)^2 to get:\[\frac{3x}{(3x)^2-4}\]and this can be simplified a little by expanding the \((3x)^2\) term to get:\[\frac{3x}{9x^2-4}\]

Answer 11

Ahhh... thanks.

Answer 12

yw :)