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Tom Frost · Answer 1 · 2023-03-08T10:52:24+0000

Answer:

Explanation:

3ab + 7a² + 2b² - (7a² - 4ab + 2b²) = 3ab + 7a² + 2b² - 7a² + 4ab - 2b²

Now combine like term. Like terms have same variable with same power.

= 3ab + 4ab + 7a² - 7a² + 2b² - 2b²

= 7ab