Function Notation

Evaluating Symbolically

Functions can also be evaluated for inputs that are variables or expressions.

Example 1 Given f(x) = 3x2 + 2x, find f(h).

Step 1. Eliminate the input value "x" and replace it with parentheses.

f() = 3()2 + 2()

Step 2. Place the input value of h inside the parentheses.

f(h) = 3(h)2 + 2(h)

Step 3. Simplify the right side of the equation.

f(h) = 3h2+ 2h

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