Math Problem Statement

the functions f and g are such that f(x) = (3x - 2)^2 and g(x) = 4x + 3. find f(5)

Solution

To find f(5)f(5), we substitute x=5x = 5 into the function f(x)=(3x2)2f(x) = (3x - 2)^2:

f(5)=(3(5)2)2f(5) = (3(5) - 2)^2

Simplify inside the parentheses:

3(5)=15,and152=133(5) = 15, \quad \text{and} \quad 15 - 2 = 13

Now square the result:

f(5)=132=169f(5) = 13^2 = 169

Final Answer:

f(5)=169f(5) = 169

Would you like details on any part of this computation? Here are 5 related questions to explore:

  1. What is g(5)g(5) if g(x)=4x+3g(x) = 4x + 3?
  2. How do you find (fg)(x)(f \circ g)(x) or (gf)(x)(g \circ f)(x) for these functions?
  3. What is f(x)f'(x), the derivative of f(x)=(3x2)2f(x) = (3x - 2)^2?
  4. Can g(x)g(x) and f(x)f(x) intersect? If so, how would you solve f(x)=g(x)f(x) = g(x)?
  5. How does squaring a linear function affect the shape of its graph?

Tip:

Always simplify the innermost expressions first when evaluating functions to avoid errors!

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Math Problem Analysis

Mathematical Concepts

Algebra
Functions
Evaluation of Functions

Formulas

f(x) = (3x - 2)^2
g(x) = 4x + 3

Theorems

Order of Operations (PEMDAS/BODMAS)

Suitable Grade Level

Grades 8-10