Question

16. From the sum of 5y ^ 2 + 7yz, - 5y ^ 2 - yz - z ^ 2 and 4yz + 3z ^ 2 subtract the sum of 5y ^ 2 - 3z ^ 2 and 8y ^ 2 + yz - 6z ^ 2 . ,​

Answer 1

so final ans is

13 Y^2 - 9YZ -11Z^2