1.

If a + b + c = 9 and ab + bc + ca = 23, then a2 + b2 + c2 =(a) 35(b) 58(c) 127(d) none of these

Answer» If a + b + c = 9 and ab + bc + ca = 23, then a2 + b2 + c2 =



(a) 35



(b) 58



(c) 127



(d) none of these


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