Question

simplify (3a+2b+c) ^2-2(3a+2b+c) (a-b+2c) +(a--b+2c) ^2​

Answer 1

Answer:

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Step-by-step explanation:

simplify (3a+2b+c) ^2-2(3a+2b+c) (a-b+2c) +(a--b+2c) ^2