Multiply : `4x^2+9y^2+16 z^2-6x y+8x z+12yz by2x+3y-4z`

Multiply: x^2+y^2+z^2-x y+x z+y z\ by x+y-z

Multiply: x^2+4y^2+z^2+2x y+x z-2y z\ by x-2y-z

Multiply: x^2+4y^2+z^2+2x y+x z-2y z\ by x-2y-z

Multiply: 4x ^ (2) + 9y ^ (2) + 16z ^ (2) -6xy + 8xz + 12yzby2x + 3y-4z

Multiply x^2+4y^2+z^2+2xy+xz-2yz by (-z+x-2y).

Factorise : 4x^(2) + 9y^(2) + z^(2) + 12xy - 6yz - 4zx

Multiply x^(2)+4y^(2)+z^(2)+2xy+xz-2yz by (-z+x-2y)

Factorise : 4x^(2) + 9y^(2) + 16z^(2) +12xy - 24yz - 16xz

If x ,y ,z are real and 4x^2+9y^2+16 z^2-6x y-12 y z-8z x=0,t h e nx , y,z are in a. A.P. b. G.P. c. H.P. d. none of these