Answer:
The expression of the ellipse is: [tex]\frac{x^2}{4} + y^2 = 1[/tex]
Step-by-step explanation:
The equation of a ellipse can be written by the following expression:
[tex]\frac{x^2}{a^2} + \frac{y^2}{b^2} = 1[/tex]
Where 2a is the length of the major axis and 2b is the length of the minor axi. Since we were given the length of the minor vertex, then:
[tex]2b = 2\\b = 1[/tex]
The length of the major axis is the distance between the two vertices.
[tex]2a = \sqrt{[2 - (-2)]^2}\\2a = \sqrt{(2 + 2)^2}\\2a = \sqrt{4^2}\\2a = 4\\a = 2[/tex]
Therefore the expression of the ellipse is:
[tex]\frac{x^2}{2^2} + \frac{y^2}{1^2} = 1\\\\\frac{x^2}{4} + y^2 = 1[/tex]
