Question

how to identify parabola, ellipse , circle etc, when a complex number equation is given ??

Answer 1

circle: \[x^2 + y^2 = Z\]
Ellipse: when a and b vary\[ax^2 + by^2 = Z\]

Answer 2

where Z is a number

Answer 3

question: the set of point Z is satisfying | Z + 4| + |Z - 4| = 0, now how to identify that this is ellipse ???

Answer 4

i know answer that it is an ellispe with e = 3/4 but dont know how to solve it