x^(2)=-16y

The focus of the parabola x ^(2) =-16 y is

The focus of the parabola x ^(2) =-16 y is

The equation of a directrix of the parabola x^(2)/16+y^(2)/25=1 is

The eccenttricity of the hyperbola x^(2)/16-y^(2)/25=1 is

Simplify: 25(2x+y)^(2)-16(x-y)^(2)

Statement 1: Two ellipses (x^(2))/(16)+(y^(2))/(9)=1 and (x^(2))/(9)+(y^(2))/(16)=1 are congruent.Statement 2:(x^(2))/(16)+(y^(2))/(16)=1 and (x^(2))/(9)+(y^(2))/(16)=1 have same eccentricity

The foci of the hyperbola 9x^2-16 y^2=144 are