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
#CarryOnLearning
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
#CarryOnLearning