1.

Find the product of (a + b + 2c) (a2 + b2 + 4c2– ab – 2bc – 2ca).

A. a3 + b3 + 8c3–abc
B. a3 + b3 + 8c3– 6abc
C. a3 + b3 + 8c3– 2abc
D. a3 + b3 + 6c3– 6abc
Answer» C. a3 + b3 + 8c3– 2abc


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