4) Subtract -4 mn + 5m2
from -9m2 + 2mn
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Answer:
Step-by-step explanation:
−9m2+2mn−(−9m2+2mn)
Distribute the Negative Sign:
=−9m2+2mn+−1(−9m2+2mn)
=−9m2+2mn+−1(−9m2)+−1(2mn)
=−9m2+2mn+9m2+−2mn
Combine Like Terms:
=−9m2+2mn+9m2+−2mn
=(−9m2+9m2)+(2mn+−2mn)
Answer:
=0
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