" (iv) "x^(4)+y^(4)-x^(2)y^(2)

Factorise : x^(4) + y^(4) - 2x^(2)y^(2)

The solution of the differential equation (dy)/(dx)+(x(x^(2)+3y^(2)))/(y(y^(2)+3x^(2)))=0 is (a) x^(4)+y^(4)+x^(2)y^(2)=c (b) x^(4)+y^(4)+3x^(2)y^(2)=c (c) x^(4)+y^(4)+6x^(2)y^(2)=c (d) x^(4)+y^(4)+9x^(2)y^(2)=c

Factorise : x^(4) + y^(4) - 3x^(2)y^(2)

Find the each of the following products: (x^(4) + y^(4))(x^(2) - y^(2))

Factorise: x^(4) + y^(4) - 27x^(2)y^(2)

Factorise : x^(4) + y^(4) - 23x^(2)y^(2)

If x=sqrta+(1)/(sqrta), y=sqrta-(1)/(sqrta) then the value of x^(4)+y^(4)-2x^(2)y^(2) is