Question

what should be subtracted from -7mn + 2mn² + 3n² to get m² + 2mn + n².

please tell ​

Answer 1

Answer:

2mn^2−m^2−9mn+2n^2 should be subtracted

Step-by-step explanation:

-7mn+2mn^2+3n^2 - x = m^2 + 2mn +n^2

x = -7mn+2mn^2+3n^2 - m^2 -2mn -n^2

=2mn^2−m^2−9mn+2n^2

hope it helps :)