Mathematics
Senior High
カッコの2と3の解き方が分かりません
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(5) (x−y)(x+y)(x¹+x³y² + y²)
(7) (x+1)³(x-1)³
17.x+y=a, xy=b のとき、次の式をa,bを用いて表せ。
(1) x² + y²
(2) x³+y³
(3) x² + y²
(x² + 1)(3
(8)
(8) (x+y)²(x² + y²) ² (x-
+52²-5a-d4a-4a-3
82-3
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