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Find the following squares using one of the above identities. Determine which of these identities will make these calculations easier.
Expand the following using the identity (a + b + c)² = a² + b² + c² + 2ab + 2bc + 2ca:
Is this an identity? (a + b – c)² + (a – b + c)² + (a – b – c)² = 2a² + 2b² + 2c².
Use suitable identities to find the following products:
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