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[" (a) If "a+b+c=9" and "ab+bc+ca=26," f...

[" (a) If "a+b+c=9" and "ab+bc+ca=26," find "a^(2)+b^(2)+c^(2)" ."],[" Also find the value of "a^(3)+b^(3)+c^(3)-3abc]

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