The range of `x^2+4y^2+9z^2-6y z-3x z-2x y` is 1.`phi` 2. `RR` 3. `[0,oo)` 4. `(-oo, 0)`

The range of x^(2)+4y^(2)+9z^(2)-6yz-3xz-2xy is 1. phi2R3*[0,oo)4.(-oo,0)

x+y+z=4 2x-y+z=-1 2x+y-3z=-9

2x+y+z=1x-y+2z=-1,3x+2y-z=4

Find the product: (2x-y+3z)(4x^2+y^2+9z^2+2x y+3y z-6x z)

Find the product: (2x-y+3z)(4x^2+y^2+9z^2+2x y+3y z-6x z)

The equations x+2y+3z=1 2x+y+3z=1 5x+5y+9z=4

Find the value of (( x -y )^3 + ( y - z )^3 + ( z - x )^3 )/ (9 ( x - y )( y - z ) ( z - x )) 1 . 0 2 . 1/9 3 . 1/3 4. 1

Find the following products: (i) (x+y+2z)(x^2+y^2+4z^2-x y-2y z-2x z) (ii) (2x-y+3z)(4x^2+y^2+9z^2+2x y+3y z-6x z)