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what must be added to 14 mn² -9mn to get -2mn² -11?​

Sagot :

Answer:

-16mn^2+9mn-11

Step-by-step explanation:

Let x be the number to be added

Then,

14mn2 -9mn + x = -2mn2-11

x=-14mn2+9mn-2mn2-11

x=-16mn2+9mn-11

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