Chapter 12: Problem 29
\(23-34\) Complete the square to determine whether the equation represents an ellipse, a parabola, a hyperbola, or a degenerate conic. If the graph is an ellipse, find the center, foci, vertices, and lengths of the major and minor axes. If it is a parabola, find the vertex, focus, and directrix. If is a hyperbola, find the center, foci, vertices, and asymptotes. Then sketch the graph of the equation. If the equation has no graph, explain why. $$ 16 x^{2}-9 y^{2}-96 x+288=0 $$
Short Answer
Step by step solution
Move constant term to the right
Group x and y terms
Complete the square for x-terms
Rearrange like hyperbola standard form
Identify the conic section
Calculate vertices and foci of hyperbola
Determine asymptotes of hyperbola
Sketch the hyperbola
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Key Concepts
These are the key concepts you need to understand to accurately answer the question.
Completing the Square
For the given problem, the equation includes both \( x \) and \( y \) terms, and our goal is to complete the square for the \( x \) components. This involves the following key steps:
- Group the \( x \) and \( y \) terms separately.
- Add and subtract the appropriate constant inside the \( x \) term group. This involves dividing the coefficient of \( x \) by two, squaring it, and adjusting the equation accordingly.
- Consider the influence of any coefficient outside the squared term, such as the factor of 16 in our problem.
Hyperbola
The standard form of a hyperbola's equation can be expressed as \[\frac{(x-h)^2}{a^2} - \frac{(y-k)^2}{b^2} = 1\]This form signals the graph of a hyperbola with a horizontal transverse axis.
- Here, \(h\) and \(k\) represent the center of the hyperbola.
- \(a\) and \(b\) are the distances that relate to the vertices and asymptotes.
Vertices and Foci
For a hyperbola of the form \[\frac{(x-h)^2}{a^2} - \frac{(y-k)^2}{b^2} = 1,\] the vertices are located at \((h \pm a, k)\), and the foci are positioned at \((h \pm c, k)\), where \(c\) is calculated using \(c = \sqrt{a^2 + b^2}\).
- The vertices are points where each branch of the hyperbola is nearest to the center.
- The foci are inside each branch and lie further away on the transverse axis than the vertices.
Asymptotes
For the standard hyperbola form \[\frac{(x-h)^2}{a^2} - \frac{(y-k)^2}{b^2} = 1,\]asymptotes are given by the equations:\[y = \pm \frac{b}{a}(x-h) + k.\]
- The slopes of the asymptotes, \(\pm \frac{b}{a}\), describe how steep or shallow the branches spread away from the center.
- Their intersection point is at the hyperbola's center, \((h, k)\).