Question

- 7mn+5, 12mn+ 9mn-8,-2mn-3​

Answer 1

Answer:

here is your answer

Step-by-step explanation:

On combining the like terms and adding them we get

= – 7mn + 5 + 12mn + 2 + (9mn – 8) + (- 2mn – 3)

= – 7mn + 5 + 12mn + 2 + 9mn – 8 – 2mn – 3

= – 7mn + 12mn + 9mn – 2mn + 5 + 2 – 8 – 3

= mn (-7 + 12 + 9 – 2) + (5 + 2 – 8 – 3)

= mn (- 9 + 21) + (7 – 11)

= mn (12) – 4

= 12mn – 4

hope it will help u

Answer 2

Answer:

-2,21,5

Step-by-step explanation:

-7+5=-2

12+9=21

-2-3=+5