Function Evaluator Calculator

Published on: November 24, 2024

Enter a function and an x-value, e.g. f(x)=2x^2 - x + 4, x=3.

Example 1: f(x) = 2x^2 − x + 4 , x=3

Step 1 - Identify the function rule and the input value.

In this problem: The function is f(x) = 2x^2 − x + 4 and the input is x=3.

f(x) = 2x^2 − x + 4 , x=3

Step 2 - Substitute the input value into the function.

In this problem: Replace x with 3.

f( 3 ) = 2×3^2 − 3 + 4

Step 3 - Evaluate to get the output.

In this problem: Evaluate the substituted expression.

2×3^2 − 3 + 4 = 19

Final answer: 19

Example 2: f(x) = 3(x+4) − 2x^2 , x=2

Step 1 - Identify the function rule and the input value.

In this problem: The function is f(x) = 3(x+4) − 2x^2 and the input is x=2.

f(x) = 3(x+4) − 2x^2 , x=2

Step 2 - Substitute the input value into the function.

In this problem: Replace x with 2.

f( 2 ) = 3(2+4) − 2×2^2

Step 3 - Evaluate to get the output.

In this problem: Evaluate the substituted expression.

3(2+4) − 2×2^2 = 10

Final answer: 10