Math Problem Statement

Complete the table of values for the functions f(x)=3x–2 and g(x)=– 2x. Write your answers as whole numbers, decimals, or simplified fractions or mixed numbers. x f(x) g(x) – 1 0 1 2 3 Based on the values in the table, where does the equation f(x)=g(x) have a solution?

Solution

Let's start by calculating the values for f(x)=3x2f(x) = 3x - 2 and g(x)=2xg(x) = -2x for the given values of xx. I'll fill in the table and then determine where f(x)=g(x)f(x) = g(x).

1. For x=1x = -1:

  • f(1)=3(1)2=32=5f(-1) = 3(-1) - 2 = -3 - 2 = -5
  • g(1)=2(1)=2g(-1) = -2(-1) = 2

2. For x=0x = 0:

  • f(0)=3(0)2=2f(0) = 3(0) - 2 = -2
  • g(0)=2(0)=0g(0) = -2(0) = 0

3. For x=1x = 1:

  • f(1)=3(1)2=32=1f(1) = 3(1) - 2 = 3 - 2 = 1
  • g(1)=2(1)=2g(1) = -2(1) = -2

4. For x=2x = 2:

  • f(2)=3(2)2=62=4f(2) = 3(2) - 2 = 6 - 2 = 4
  • g(2)=2(2)=4g(2) = -2(2) = -4

5. For x=3x = 3:

  • f(3)=3(3)2=92=7f(3) = 3(3) - 2 = 9 - 2 = 7
  • g(3)=2(3)=6g(3) = -2(3) = -6

Completed Table:

xxf(x)=3x2f(x) = 3x - 2g(x)=2xg(x) = -2x
-1-52
0-20
11-2
24-4
37-6

Now, to find where f(x)=g(x)f(x) = g(x):

We want to solve 3x2=2x3x - 2 = -2x.

  • Adding 2x2x to both sides:
    3x+2x2=05x2=03x + 2x - 2 = 0 \quad \Rightarrow \quad 5x - 2 = 0
  • Adding 22 to both sides:
    5x=25x = 2
  • Dividing both sides by 55:
    x=25x = \frac{2}{5}

Thus, the equation f(x)=g(x)f(x) = g(x) has a solution at x=25x = \frac{2}{5}, which does not appear directly in the table but is the exact solution for when f(x)=g(x)f(x) = g(x).

Would you like more details or have any further questions? Here are 5 related questions for you:

  1. How would you solve for xx in equations with different linear functions like f(x)=2x+3f(x) = 2x + 3 and g(x)=4x1g(x) = 4x - 1?
  2. How can you graph the two functions f(x)=3x2f(x) = 3x - 2 and g(x)=2xg(x) = -2x?
  3. What is the general method for finding where two linear functions intersect?
  4. How can you apply this process to non-linear equations?
  5. What happens when two functions are parallel, and they never intersect?

Tip: When solving for where two linear functions are equal, always isolate xx to find the point of intersection. If the functions are parallel, they will not intersect.

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Math Problem Analysis

Mathematical Concepts

Algebra
Linear Equations
Function Tables
Solving Equations

Formulas

f(x) = 3x - 2
g(x) = -2x
Finding intersection: f(x) = g(x) → 3x - 2 = -2x

Theorems

Equality of Functions
Solving Linear Equations

Suitable Grade Level

Grades 8-10