In Exercises 109–114, find the x-intercept(s) of the graph of each equation. Use the x-intercepts to match the equation with its graph. The graphs are shown in [- 10, 10, 1] by [- 10, 10, 1] viewing rectangles and labeled (a) through (f). y = - (x + 1)² + 4

검증된 단계별 안내

To find the x-intercepts of the graph, set y = 0 in the given equation. The equation becomes 0 = - (x + 1)^2 + 4.

Rearrange the equation to isolate the squared term: (x + 1)^2 = 4.

Take the square root of both sides, remembering to include both the positive and negative roots: x + 1 = ±√4.

Simplify the square root: x + 1 = ±2. This gives two equations: x + 1 = 2 and x + 1 = -2.

Solve each equation for x: For x + 1 = 2, subtract 1 to get x = 1. For x + 1 = -2, subtract 1 to get x = -3. The x-intercepts are x = 1 and x = -3.

비슷한 문제에 대한 검증된 영상 답변:

이 영상 해법은 위 문제에 도움이 된다고 튜터들이 추천한 것입니다.

영상 길이:

주요 개념

질문에 올바르게 답하기 위해 반드시 이해해야 하는 핵심 개념들은 다음과 같습니다.

X-Intercept

The x-intercept of a graph is the point where the graph intersects the x-axis. This occurs when the value of y is zero. To find the x-intercept, you set the equation equal to zero and solve for x. In the given equation, this means solving - (x + 1)^2 + 4 = 0.

Quadratic Functions

The equation provided is a quadratic function, which is typically in the form y = ax^2 + bx + c. Quadratic functions produce parabolic graphs, which can open upwards or downwards depending on the sign of 'a'. In this case, the negative sign indicates the parabola opens downwards, affecting the location of the x-intercepts.

Graphing Techniques

Understanding how to graph a quadratic function involves identifying key features such as the vertex, axis of symmetry, and intercepts. The vertex can be found using the formula x = -b/(2a), and the intercepts help in sketching the graph accurately. This knowledge is essential for matching the equation to its corresponding graph.

In Exercises 109–114, find the x-intercept(s) of the graph of each equation. Use the x-intercepts to match the equation with its graph. The graphs are shown in [- 10, 10, 1] by [- 10, 10, 1] viewing rectangles and labeled (a) through (f). y = - (x + 1)2 + 4