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When expanded the expression (a+2b-c)^(2...

When expanded the expression `(a+2b-c)^(2)` is equal to

A

`a^(2)+4b^(2)+c^(2)-2ab-2bc-ac`

B

`a^(2)+4b^(2)+c^(2)+4ab+4bc+2ac`

C

`a^(2)+4b^(2)+c^(2)+4ab-4bc-2ac`

D

`a^(2)+4b^(2)+c^(2)+4ab-4bc-4ac`

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