Solve the following:Add 7xy+5yz−3zx,4yz+9zx−4y,−3xz+5x−2y
We have to add 7xy+5yz−3zx,4yz+9zx−4y,−3xz+5x−2y
(7xy+5yz−3zx)+(4yz+9zx−4y)+(−3xz+5x−2y)
=7xy+5yz−3zx+4yz+9zx−4y−3xz+5x−2y
=7xy+5yz+4yz−3zx−3xz+9zx−4y−2y+5x
=7xy+9yz+3xz+5x−6y [∵xz=zx]
When 7xy+5yz−3zx, 4yz+9zx−4y and −3xz+5x−2xy are added, we get 5xy+9yz+3zx+5x−4y.
When 4yz+9zx−4y and −3xz+5x−2xy are added, we get 4yz+6xz−2xy−4y+5x.