Answer:
13m² + 7mn - 11n²
Step-by-step explanation:
7m² - 3mn + 11n²
+
6m² + 10mn - 22n²
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Answers & Comments
Answer:
13m² + 7mn - 11n²
Step-by-step explanation:
7m² - 3mn + 11n²
+
6m² + 10mn - 22n²
________________
13m² + 7mn - 11n²