Math Problem Statement

f (x) = x^2 + 2x - 3, g (x) = x^2 - 4x + 2, h (x) = -2x + 1, k (x) = 0, solve f(f(-2))

Solution

Let's solve f(f(2))f(f(-2)), where f(x)=x2+2x3f(x) = x^2 + 2x - 3.

Step 1: Solve for f(2)f(-2)

We first need to find f(2)f(-2) by substituting x=2x = -2 into the function f(x)f(x).

f(2)=(2)2+2(2)3f(-2) = (-2)^2 + 2(-2) - 3 f(2)=443f(-2) = 4 - 4 - 3 f(2)=3f(-2) = -3

Step 2: Solve for f(f(2))=f(3)f(f(-2)) = f(-3)

Now, substitute x=3x = -3 into the function f(x)f(x) to get f(3)f(-3).

f(3)=(3)2+2(3)3f(-3) = (-3)^2 + 2(-3) - 3 f(3)=963f(-3) = 9 - 6 - 3 f(3)=0f(-3) = 0

Thus, f(f(2))=0f(f(-2)) = 0.

Final Answer:

f(f(2))=0f(f(-2)) = 0

Do you have any questions, or would you like more details?

Here are 5 related questions to expand on this:

  1. What is g(f(2))g(f(-2)) using the given g(x)g(x)?
  2. Find h(f(2))h(f(-2)).
  3. Calculate f(h(3))f(h(-3)).
  4. Solve f(x)=0f(x) = 0 for xx.
  5. What is g(g(2))g(g(-2))?

Tip: When solving nested functions, break it down step by step by first solving the innermost function, then use that result for the next.

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Math Problem Analysis

Mathematical Concepts

Algebra
Functions
Quadratic Equations

Formulas

f(x) = x^2 + 2x - 3
f(f(x)) = f(f(-2)) = 0
Substitution method in functions

Theorems

Basic function composition

Suitable Grade Level

Grades 8-10