What is the eccentricity of the following ellipse?`2x^2+5y^2=20`.

Find the eccentricities and foci of the following ellipse: x^2+2y^2=2 .

Find the eccentricities and foci of the following ellipse: 9x^2+25y^2=225 .

Find the eccentricities and foci of the following ellipse: 3x^2+4y^2=48 .

What is the eccentricty of the hyperbola 9x^2-16y^2=144 .

Factorise the following : x^2 - y^2

Find the eccentricity of the hyperbola (i) x ^2 /4 - y ^2 = 1

Find the coordinates of vertices,the foci,the eccentricity and the equations of the directrix of the following hyperbola. x^2/16-y^2/9=1 .

Find the coordinates of vertices,the foci,the eccentricity and the equations of the directrix of the following hyperbola. 16x^2-9y^2=576 .

Find the equation of the directrices of the ellipse x^2/25+y^2/9=1 .

Factorise the following expressions. 5x^2y - 15xy^2