Answer:
-2a² - 3b² + 5ab
Explanation:
(b-a) - (2a-3b)
= b(2a-3b) -a(2a-3b)
= 2ab - 3b² - 2a² + 3ab
= -2a² - 3b² + 3ab + 2ab
= -2a² - 3b² + 5ab
Answer: (2a+3b)-(a+b) = a + 2b.
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