Math Problem Statement

If f left parenthesis x right parenthesis equals short dash 2 x plus 5 and g left parenthesis x right parenthesis equals x squared minus 1, then f left parenthesis short dash 3 right parenthesis plus g left parenthesis 2 right parenthesis = __

Solution

We are given two functions:

f(x)=2x+5f(x) = -2x + 5 g(x)=x21g(x) = x^2 - 1

We need to calculate f(3)+g(2)f(-3) + g(2).

Step 1: Calculate f(3)f(-3)

Substitute x=3x = -3 into the function f(x)f(x):

f(3)=2(3)+5f(-3) = -2(-3) + 5 f(3)=6+5=11f(-3) = 6 + 5 = 11

Step 2: Calculate g(2)g(2)

Substitute x=2x = 2 into the function g(x)g(x):

g(2)=221g(2) = 2^2 - 1 g(2)=41=3g(2) = 4 - 1 = 3

Step 3: Add the results

Now, add the results of f(3)f(-3) and g(2)g(2):

f(3)+g(2)=11+3=14f(-3) + g(2) = 11 + 3 = 14

Final Answer:

f(3)+g(2)=14f(-3) + g(2) = 14


Would you like any more details or have any further questions?

Here are some related questions you might find interesting:

  1. What is the domain and range of the function f(x)=2x+5f(x) = -2x + 5?
  2. How can you find the intersection points of the functions f(x)f(x) and g(x)g(x)?
  3. What would happen to the result of f(3)+g(2)f(-3) + g(2) if we change the coefficients of f(x)f(x) and g(x)g(x)?
  4. How would you calculate f(x)+g(x)f(x) + g(x) for any given xx?
  5. Can you find the inverse of g(x)=x21g(x) = x^2 - 1?

Tip: Always carefully substitute the given values into the functions to avoid calculation errors!

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Math Problem Analysis

Mathematical Concepts

Functions
Substitution
Linear Functions
Quadratic Functions

Formulas

f(x) = -2x + 5
g(x) = x^2 - 1

Theorems

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Suitable Grade Level

Grades 9-10