" (1) "[" Jullzus "],[(1-x^(2))(1-y^(2))+4xy]

Factorise : (1-x^(2))(1-y^(2)) + 4xy

Factorise : (x^(2)-1)(y^(2)-1)-4xy

If xy + yz + zx = 1 , show that x/(1-x^(2)) +y/(1-y^(2)) + z/(1-z^(2))= (4xyz)/((1-x^(2))(1-y^(2)) (1-z^(2)))

If xy + yz + zx = 1 , show that x/(1-x^(2)) +y/(1-y^(2)) + z/(1-z^(2))= 4xyz/((1-x^(2))(1-y^(2)) (1-z^(2)))

Simplify : (x^(2) - y^(2) + 2xy + 1) - (x^(2) + y^(2) + 4xy - 5)

Find the following products: (4)/(27)xyz((9)/(2)x^(2)yz-(3)/(4)xyz^(2)) 1.5x(10x^(2)y-100xy^(2)) 4.1xy(1.1x-y)250.5xy(xz+(y)/(10))

If xy+yz+xz=1, then prove that (x)/(1-x^(2))+(y)/(1-y^(2))+(z)/(1-z^(2))=(4xyz)/((1-x^(2))(1-y^(2))(1-z^(2)))

If xy + yz + zx = 1 , prove that : x/(1-x^2)+y/(1-y^2)+z/(1-z^2)= (4xyz)/((1-x^2)(1-y^2)(1-z^2)) .