1.

M-3mn+n+9 from 11m-7mn+2n-5

Answer»

ANSWER:

10m - 4MN + n - 14

Step-by-step explanation:

11m - 7MN + 2n - 5  minus m - 3mn + n + 9  

11m - 7mn + 2n - 5  + (-)m - 3mn + n + 9  

*Multiplying the second equation by a NEGATIVE so we can add instead of subtract* (Negative times a negative is a positive; a postive times a negative is a negative)

11m - 7mn + 2n - 5  + -m + 3mn - n - 9

10m - 4mn + n - 14



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