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Answer 1

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Add : 3a²b+4ab-b², 7b²-4ab+2a² , a²+b²

↠ 3a²b+4ab-b² + 7b²-4ab+2a² + a²+b²

↠ Arrange the like terms

↠ 3a² + 2a² + a² + 4ab - 4ab - b² + 7b² + b²

↠ 6a² ( + 4ab - 4ab cancles each other) 7b²

↠ ans : 6a² + 7b²

HOPE SO IT HELPS YOU

Answer 2

Answer:

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Step-by-step explanation:

a) 3a²+4ab-b², 7b²- 4ab+ 2a², a² +b²

b) 5xy-7x²-3y² + 4x²y, 5x²y - xy +x²+y²

c) 5a² - 2b³ +3a³b+7ab², 3a²b-5ab², a³+b³-a²