Question

solve this question....

Answer 1

1)-

  4xy -  5yz -  7zx
- 5xy + 2yz +  zx
- 2xy -  3yz + 3zx
___________________

- 3xy - 6yz - 3zx 


2)- 

   2x^2 - 3xy + y^2
 - 7x^2 - 5xy - 2y^2
   4x^2 +xy   - 6y^2
________________

- x^2 - 7xy - 7y^2



i hope this will help you


-by ABHAY 

Answer 2

Hi,

Please see the attached file!


Thanks