# Find f(g(-3))

• April 8th 2010, 08:06 AM
Tally
Find f(g(-3))
When f(x)=x^2-1 and g(x)=x+2

If someone could help me with first step I could probably do the rest.

Thanks,
• April 8th 2010, 08:14 AM
Coach
Hi!

Try sticking the expressions for $g(x)$into the place of the x in the expression of $f(x)$.
$
f(g(x))=(x+2)^2-1
$
.

Hope this helps... I'm not mathematician.
• April 8th 2010, 08:26 AM
harish21
Quote:

Originally Posted by Tally
When f(x)=x^2-1 and g(x)=x+2

If someone could help me with first step I could probably do the rest.

Thanks,

$g(-3) = -3+2 = -1$

$f(g(-3))= (-1)^{2} -1 = 1-1 = 0$
• April 8th 2010, 11:03 AM
Tally
Quote:

Originally Posted by harish21
$g(-3) = -3+2 = -1$

$f(g(-3))= (-1)^{2} -1 = 1-1 = 0$

Awesome Thank you. I understand it much clearer now. (Clapping)