SAT Math 2.3 Algebra and Functions. Calculate this function.
|Functions||Basics of Functions|
|Product Type||SAT Math|
|SAT Math||Algebra and Functions|
and use them to find g of f of x.
As always, we start with the innermost set of parentheses.
We know that f of x equals x squared minus x.
Since we first want to find f of negative 2, we can replace x with negative 2.
If we do that, we get negative 2 squared minus negative 2 equals
4 minus negative 2, which equals 4 plus 2, which is 6.
f of negative 2 equals 6. Since we can replace f of negative 2 with
just plain old 6, the problem simplifies to g of 6.
G of x is equal to x minus 2, and in this case, x is f of negative 2, or 6.
So you just take 6 minus 2 to get 4, and... we've got our solution.
C's our guy.