Identify the conic section $$$\frac{x^{2}}{4} = 30$$$
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Identify and find the properties of the conic section $$$\frac{x^{2}}{4} = 30$$$.
Solution
The general equation of a conic section is $$$A x^{2} + B x y + C y^{2} + D x + E y + F = 0$$$.
In our case, $$$A = \frac{1}{4}$$$, $$$B = 0$$$, $$$C = 0$$$, $$$D = 0$$$, $$$E = 0$$$, $$$F = -30$$$.
The discriminant of the conic section is $$$\Delta = 4 A C F - A E^{2} - B^{2} F + B D E - C D^{2} = 0$$$.
Next, $$$B^{2} - 4 A C = 0$$$.
Since $$$\Delta = 0$$$, this is the degenerated conic section.
Since $$$B^{2} - 4 A C = 0$$$, the equation represents two parallel lines.
Answer
$$$\frac{x^{2}}{4} = 30$$$A represents a pair of the lines $$$x = - 2 \sqrt{30}$$$, $$$x = 2 \sqrt{30}$$$A.
General form: $$$\frac{x^{2}}{4} - 30 = 0$$$A.
Factored form: $$$\left(x - 2 \sqrt{30}\right) \left(x + 2 \sqrt{30}\right) = 0$$$A.
Graph: see the graphing calculator.