Multiply :
`-3x + 4y - z" by " 7z `

Simplify : (3y + 4z)(3y - 4z) + (2y + 7z)(y+z)

Multiply : -8/5x^2y z^3\ b y\ -3/4x y^2z (ii) 3/(14)x^2y \ by\ 7/2x^4y

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

Subtract 12x + 3y - z from the sum of 7x + 4y - 5z + 5 and 6x - 7z - 8 .

If 7x + 6y - 2z = 0, 3x + 4y + 2z = 0, x - 2y - 6z = 0 then which option is correct

Multiply: 3,15 x\ a n d-23 x^2y (ii) x , x^2y z\ a n d-3/7x y z^2

The system of equation 3x + 4y + 5z = mu x + 2y + 3z = 1 4x + 4y + 4z = delta is inconsistent, then ( delta,mu ) can be

If A= (1)/(9) ((-8,1,4),(4,4,7),(1,-8,4)) , prove that, A^(-1)= A^(T) . Hence solve the following system of equations: -8x + y + 4z= 0, 4x + 4y + 7z= 18, x- 8y + 4z= 9