What is the value of a2+b2+c2-2ab-2bc+2ca?
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Q:
What is the value of a2+b2+c2-2ab-2bc+2ca?
- 1(2a + b + c)2false
- 2true
(a − b + c)2
- 3false
(a − b − 2c)2
- 4false
(a + 2b − c)2
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