Math Problem Statement

Let f(x) = 2x² - 4x + 1 and g(x) = -x² - 2x - 1 Find (f + g)(x)

Solution

To find (f+g)(x)(f + g)(x), we simply add the two functions f(x)f(x) and g(x)g(x):

f(x)=2x24x+1f(x) = 2x^2 - 4x + 1 g(x)=x22x1g(x) = -x^2 - 2x - 1

Now, adding the corresponding terms from both functions:

(f+g)(x)=(2x24x+1)+(x22x1)(f + g)(x) = (2x^2 - 4x + 1) + (-x^2 - 2x - 1)

Simplifying each term:

  • 2x2+(x2)=x22x^2 + (-x^2) = x^2
  • 4x+(2x)=6x-4x + (-2x) = -6x
  • 1+(1)=01 + (-1) = 0

Thus, the result is:

(f+g)(x)=x26x(f + g)(x) = x^2 - 6x

Final Answer:

(f+g)(x)=x26x(f + g)(x) = x^2 - 6x

Would you like further details or have any other questions?

Related Questions:

  1. How do you subtract functions, such as (fg)(x)(f - g)(x)?
  2. What happens when you multiply f(x)f(x) and g(x)g(x)?
  3. How do you find the domain of (f+g)(x)(f + g)(x)?
  4. Can you find the derivative of f(x)f(x) and g(x)g(x)?
  5. How do you find the zeros of (f+g)(x)(f + g)(x)?

Tip:

When adding or subtracting functions, always combine like terms (terms with the same powers of xx).

Ask a new question for Free

By Image

Drop file here or Click Here to upload

Math Problem Analysis

Mathematical Concepts

Algebra
Addition of Functions
Quadratic Functions

Formulas

(f + g)(x) = f(x) + g(x)
Quadratic function ax² + bx + c

Theorems

Addition of Functions

Suitable Grade Level

Grades 8-10