Mathematics
Senior High
③の解説お願いします！！
⑤① 実数x、y、zがつな+2=2,
********
xy+y2+zx=-5
I 2₁2=-6
をみたすとき次の式の値を求めよ。
0 = = = = + = = 2 + 2 / 2
①
xy
2x
② x3+y3+23
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