Evaluating the Function at Different Points

Oct 13, 2025 by wbrum.org 43 views

Introduction

In mathematics, functions are used to describe the relationship between variables. A function is a rule that assigns to each input value, a unique output value. In this article, we will be working with a quadratic function, $f(x) = 4x^2 - 3x + 2$ . We will be asked to find the value of $f(2) \times f(-2) + f(1)$ , which involves evaluating the function at different points and performing arithmetic operations.

Evaluating the Function at Different Points

To find the value of $f(2) \times f(-2) + f(1)$ , we need to evaluate the function at the points $x = 2$ , $x = -2$ , and $x = 1$ . We can do this by plugging in the values of $x$ into the function and simplifying the resulting expressions.

Evaluating $f(2)$

To evaluate $f(2)$ , we substitute $x = 2$ into the function:

$f(2) = 4(2)^2 - 3(2) + 2$

Using the order of operations, we first evaluate the exponent:

$f(2) = 4(4) - 6 + 2$

Next, we multiply:

$f(2) = 16 - 6 + 2$

Finally, we add and subtract from left to right:

$f(2) = 12$

Evaluating $f(-2)$

To evaluate $f(-2)$ , we substitute $x = -2$ into the function:

$f(-2) = 4(-2)^2 - 3(-2) + 2$

Using the order of operations, we first evaluate the exponent:

$f(-2) = 4(4) + 6 + 2$

Next, we multiply:

$f(-2) = 16 + 6 + 2$

Finally, we add and subtract from left to right:

$f(-2) = 24$

Evaluating $f(1)$

To evaluate $f(1)$ , we substitute $x = 1$ into the function:

$f(1) = 4(1)^2 - 3(1) + 2$

Using the order of operations, we first evaluate the exponent:

$f(1) = 4(1) - 3 + 2$

Next, we multiply:

$f(1) = 4 - 3 + 2$

Finally, we add and subtract from left to right:

$f(1) = 3$

Finding the Value of $f(2) \times f(-2) + f(1)$

Now that we have evaluated the function at the points $x = 2$ , $x = -2$ , and $x = 1$ , we can find the value of $f(2) \times f(-2) + f(1)$ by multiplying $f(2)$ and $f(-2)$ and then adding $f(1)$ :

$f(2) \times f(-2) + f(1) = 12 \times 24 + 3$

Using the order of operations, we first multiply:

$f(2) \times f(-2) + f(1) = 288 + 3$

Finally, we add:

$f(2) \times f(-2) + f(1) = 291$

Conclusion

In this article, we evaluated the function $f(x) = 4x^2 - 3x + 2$ at the points $x = 2$ , $x = -2$ , and $x = 1$ . We then used these values to find the value of $f(2) \times f(-2) + f(1)$ . By following the order of operations and simplifying the resulting expressions, we arrived at the final answer of $291$ .

Final Answer

The final answer is $\boxed{291}$ .

Introduction

In our previous article, we evaluated the function $f(x) = 4x^2 - 3x + 2$ at the points $x = 2$ , $x = -2$ , and $x = 1$ . We then used these values to find the value of $f(2) \times f(-2) + f(1)$ . In this article, we will answer some frequently asked questions related to this topic.

Q&A

Q: What is the value of $f(2)$ ?

A: The value of $f(2)$ is $12$ . To find this, we substitute $x = 2$ into the function and simplify the resulting expression.

Q: What is the value of $f(-2)$ ?

A: The value of $f(-2)$ is $24$ . To find this, we substitute $x = -2$ into the function and simplify the resulting expression.

Q: What is the value of $f(1)$ ?

A: The value of $f(1)$ is $3$ . To find this, we substitute $x = 1$ into the function and simplify the resulting expression.

Q: How do we find the value of $f(2) \times f(-2) + f(1)$ ?

A: To find the value of $f(2) \times f(-2) + f(1)$ , we multiply $f(2)$ and $f(-2)$ and then add $f(1)$ . This gives us $12 \times 24 + 3 = 291$ .

Q: What is the order of operations that we should follow when evaluating expressions?

A: The order of operations that we should follow when evaluating expressions is:

Parentheses: Evaluate expressions inside parentheses first.
Exponents: Evaluate any exponential expressions next.
Multiplication and Division: Evaluate any multiplication and division operations from left to right.
Addition and Subtraction: Finally, evaluate any addition and subtraction operations from left to right.

Q: How do we simplify expressions?

A: To simplify expressions, we should follow the order of operations and combine like terms. This means that we should add or subtract terms with the same variable and coefficient.

Q: What are some common mistakes to avoid when evaluating expressions?

A: Some common mistakes to avoid when evaluating expressions include:

Not following the order of operations
Not combining like terms
Not simplifying expressions
Not checking for errors in calculations

Conclusion

In this article, we answered some frequently asked questions related to the topic of evaluating the function $f(x) = 4x^2 - 3x + 2$ at different points and finding the value of $f(2) \times f(-2) + f(1)$ . We also discussed the order of operations and how to simplify expressions.

Final Answer

The final answer is $\boxed{291}$ .