Question

If h(x)=x²- 5x+7, find each value. h(2)​

Answer 1

1

Explanation:

Function notation is a helpful way to represent a relationship between x and y.

Function Notation

Function notation is often expressed as f(x) = x. This is said as "f of x equals x." The "f(x)" presents the y-value. While f(x) is the most common, any letter can be used. In this case, h is used instead of f. In function notation, you have h(x) set equal to some function. The variable inside the parentheses is the independent variable of the function.

Additionally, if a constant is in the parentheses, then the function should be solved for that constant. This means to find h(2), we should plug 2 in for x and solve.

Solving the Function

To solve this, we need to plug 2 in.

• h(2) = 2² - 5(2) + 7

Then, simplify and solve.

• h(2) = 4 - 10 + 7
• h(2) = 1

This means that given the function, h(2) is equal to 1.