Question

7xy + 3yz – 5zx ; - 5xy + 3zx + 2yz; 4yz + 8xy – zx

Answer 1

Answer:

first we should select the like terms:

1) 7xy , +8xy, -5xy

2) 3yz, +2yz, 4yz

3) -5zx, 3zx , -zx

If you want to add them :

1) 7xy + 8xy + (-5xy)

15xy+(-5xy)

10xy

2) 3yz+2yz+4yz

9yz

3) -5zx+3zx+(-zx)

2zx+(-zx)