Question

5/What should be added to 7x² + 3xy - y to get
- x² + 2xy + y?​

Answer 1

Answer:

- 8x² - xy +2 y

Step-by-step explanation:

given addend= 7x² + 3xy - y

sum = - x² + 2xy + y

required addend = sum - given addend

= - x² + 2xy + y -(7x² + 3xy - y)

= - x² + 2xy + y -7x² - 3xy +y

= - 8x² - xy +2 y

required addend == - 8x² - xy +2 y