Question

What should be subtracted from - 7mn + 2m² +3m² to get m² + 2mn +n²?

please give correct answer with explanation
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Answer 1

Answer:

m²+2n²-9mn

Step-by-step explanation:

Let the number that is to be subtracted=x.

According to the given Condition:-

⇒2m²+3n²-7mn-(x)=m² + 2mn +n²

⇒2m²+3n²-7mn-(m² + 2mn +n²)=x

⇒x=2m²-m²+3n²-n²-7mn-2mn

⇒x=m²+2n²-9mn

∴ m²+2n²-9mn should be subtracted from - 7mn + 2m² +3m² to get m² + 2mn +n².