find the product of
(a+b+c)(a+b-c)
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Answer:
( a² + b² - c² + 2ab)
Step-by-step explanation:
= (a+b+c) (a+b-c)
= [ ( a+ b ) + c ] [ (a + b ) - c ]
= [ ( a + b )² - c² ]
= [ a²+ b² + 2ab - c² ]
= ( a² + b² - c² + 2ab)
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