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Teachers & SchoolsSAT Math 2.3 Algebra and Functions. Calculate this function.
Algebra | Functions |
Functions | Basics of Functions Function Notation Function Rules |
Language | English Language |
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.