Mathematics
Senior High

(2)のやり方が分からないので教えてください

□ 227 次の式を簡単にせよ。 x+y₁ x=y x-y x+y x-y x+y x+y x-y *(1) (2) x+1 1 x+2 1– + x+3 1 x+2 1+

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