Question

What is the value of (a² + b²+4c²- ab-2bc-2ca) (a + b+2c):

A a³+b³+4c3 - 6abc
B a³+b³ + 8c3 - 6abc
C a³+b³+8c³ + 6abc
D a³+b³+8c3-4abc
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