Mathematics
Senior High
対称式のii番がわかりません、
教えてください🙏
(3) x+y+z=3,xy+yz+zx=4.xyz=5のとき,次の各式の
値を求めよ.
(i) x² + y² +2²
(ii) x²y²+y²z²+z²x²
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