Math Problem Statement

Let f(x) = 2x^3 - 5x + 4 and g(x) = 3x^2 + 2x - 6. Find (f + g)(x).

Solution

The problem provided asks to find (f+g)(x)(f + g)(x), given the following functions:

  • f(x)=2x35x+4f(x) = 2x^3 - 5x + 4
  • g(x)=3x2+2x6g(x) = 3x^2 + 2x - 6

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

(f+g)(x)=f(x)+g(x)(f + g)(x) = f(x) + g(x)

Substitute the expressions for f(x)f(x) and g(x)g(x):

(f+g)(x)=(2x35x+4)+(3x2+2x6)(f + g)(x) = (2x^3 - 5x + 4) + (3x^2 + 2x - 6)

Now, combine like terms:

(f+g)(x)=2x3+3x25x+2x+46(f + g)(x) = 2x^3 + 3x^2 - 5x + 2x + 4 - 6

Simplify the terms:

(f+g)(x)=2x3+3x23x2(f + g)(x) = 2x^3 + 3x^2 - 3x - 2

So, (f+g)(x)(f + g)(x) is:

(f+g)(x)=2x3+3x23x2(f + g)(x) = 2x^3 + 3x^2 - 3x - 2

Would you like more details on this?

Here are 5 related questions:

  1. How would you subtract g(x)g(x) from f(x)f(x)?
  2. What is (fg)(x)(f \cdot g)(x) for the given functions?
  3. How do you find the derivative of (f+g)(x)(f + g)(x)?
  4. Can you evaluate (f+g)(x)(f + g)(x) for a specific value of xx?
  5. What is the degree of the polynomial (f+g)(x)(f + g)(x)?

Tip: When adding polynomials, always combine like terms carefully to avoid mistakes in simplification.

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Math Problem Analysis

Mathematical Concepts

Polynomials
Addition of Functions
Combining Like Terms

Formulas

(f + g)(x) = f(x) + g(x)

Theorems

Basic Operations on Polynomials

Suitable Grade Level

Grade 10-12