the question is incomplete plzz click the photo of question properly in the first question the value of a²+b²+c² is not visible and in 2nd question the value of ab+bc+ca is not visible simily in the third one too the value is not visible
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the question is incomplete plzz click the photo of question properly in the first question the value of a²+b²+c² is not visible and in 2nd question the value of ab+bc+ca is not visible simily in the third one too the value is not visible