Math Problem Statement

Use a graphing calculator to determine the x intercepts of the graph y = (x - 1)^2 - 4.

Solution

Let's analyze the problem. The equation given is:

y=(x1)24y = (x - 1)^2 - 4

To find the x-intercepts, we set y=0y = 0 and solve for xx:

0=(x1)240 = (x - 1)^2 - 4

  1. Add 4 to both sides:

4=(x1)24 = (x - 1)^2

  1. Take the square root of both sides:

x1=±2x - 1 = \pm 2

  1. Solve for xx:
  • x1=2    x=3x - 1 = 2 \implies x = 3
  • x1=2    x=1x - 1 = -2 \implies x = -1

So, the x-intercepts are x=3x = 3 and x=1x = -1.

The correct answer is option 2: "The graph intercepts the x-axis at 3 and -1."

Would you like further details or have any questions?

Here are 5 related questions to expand your understanding:

  1. How do you find the y-intercept of a quadratic equation?
  2. What does the vertex of the equation y=(x1)24y = (x - 1)^2 - 4 represent?
  3. How can you rewrite y=(x1)24y = (x - 1)^2 - 4 in standard form?
  4. What is the axis of symmetry for the graph of y=(x1)24y = (x - 1)^2 - 4?
  5. How does the graph of y=(x1)24y = (x - 1)^2 - 4 compare to y=x2y = x^2?

Tip: When finding x-intercepts, always set y=0y = 0 and solve for xx.

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Math Problem Analysis

Mathematical Concepts

Algebra
Quadratic Equations
Graphing

Formulas

(x - 1)^2 - 4 = 0
Taking square roots

Theorems

Zero-product property
Vertex form of a quadratic equation

Suitable Grade Level

Grades 8-10