Math Problem Statement

A function is described by the equation f(x) = -3x^2 + 5x - 2, in which f(x) is dependent on x. If a value for the independent variable is chosen from the set {-3, -2, -1, 0, 1}, which of the following would be a corresponding dependent value? Options: -14, 0, -2, 1, -1.

Solution

The problem provides the equation for a function:

f(x)=3x2+5x2f(x) = -3x^2 + 5x - 2

We are tasked with finding the corresponding dependent value f(x)f(x) for values of xx chosen from the set { -3, -2, -1, 0, 1 }.

Let’s substitute each value of xx into the equation and calculate the corresponding f(x)f(x) for each.

Substituting x=3x = -3:

f(3)=3(3)2+5(3)2=3(9)152=27152=44f(-3) = -3(-3)^2 + 5(-3) - 2 = -3(9) - 15 - 2 = -27 - 15 - 2 = -44

Substituting x=2x = -2:

f(2)=3(2)2+5(2)2=3(4)102=12102=24f(-2) = -3(-2)^2 + 5(-2) - 2 = -3(4) - 10 - 2 = -12 - 10 - 2 = -24

Substituting x=1x = -1:

f(1)=3(1)2+5(1)2=3(1)52=352=10f(-1) = -3(-1)^2 + 5(-1) - 2 = -3(1) - 5 - 2 = -3 - 5 - 2 = -10

Substituting x=0x = 0:

f(0)=3(0)2+5(0)2=2f(0) = -3(0)^2 + 5(0) - 2 = -2

Substituting x=1x = 1:

f(1)=3(1)2+5(1)2=3(1)+52=3+52=0f(1) = -3(1)^2 + 5(1) - 2 = -3(1) + 5 - 2 = -3 + 5 - 2 = 0

Now, let's review the choices:

  • f(3)=44f(-3) = -44
  • f(2)=24f(-2) = -24
  • f(1)=10f(-1) = -10
  • f(0)=2f(0) = -2
  • f(1)=0f(1) = 0

Among the provided options, the closest corresponding dependent value is -2 (for x=0x = 0).

Answer:

  • The correct answer is -2.

Would you like more detailed steps or have any questions? Here are some related questions to explore:

  1. How do we evaluate a function for different values of xx?
  2. What happens if the coefficient of x2x^2 in the function changes?
  3. Can the quadratic function have a different set of values for xx?
  4. How would the graph of this function look like?
  5. What are other types of functions that could be solved similarly?

Tip: Always substitute each value of xx directly into the equation and simplify step by step!

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Math Problem Analysis

Mathematical Concepts

Algebra
Quadratic Functions
Function Evaluation

Formulas

f(x) = ax^2 + bx + c

Theorems

Quadratic Function Evaluation

Suitable Grade Level

Grades 7-9