What is the simplified form of the expression (a+b+c)^2+(a-b-c)^2-2b(2c+b)
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Answer:
2a^2 + 2c^2
Step-by-step explanation:
= a^2 + b^2 + c^2 + 2ab + 2bc + 2ac + a^2 + b^2 + c^2 - 2ab + 2bc - 2ac - 4bc - 2b^2
= 2a^2 + 2c^2
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