5a2- 8ab+ 4b2 from 3ab-2a2-5b2
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Step-by-step explanation:
3ab−2a
2
−2b
2
−(5a
2
−7ab+5b
2
)
3ab−2a
2
−2b
2
−5a
2
+7ab−5b
2
10ab−7a
2
−7b
2
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