Question

focos F(+3, O) e vértices A(+4, O);

Answer 1

c = 3

a = 4

a^2 = b^2 + c^2

4^2 = b^2 + 3^2

16 = b^2 + 9

b^2 = 7

x^2/16 + y^2/7= 7*16

7x^2 + 16y^2 = 112

7x^2 + 16y^2 - 112 = 0