Question

add the following 3l²mn-lm²n+2lm²n+lmn²+-3lmn²+2l²mn
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Answer 1

Answer:

5l²mn + lm²n - 2lmn².

Step-by-step explanation:

3l²mn - lm²n + 2lm²n + lmn² + -3lmn² +2l²mn

Bringing like terms together:

= 3l²mn +2l²mn  - lm²n + 2lm²n + lmn² - 3lmn²

= 5l²mn + lm²n - 2lmn².