Toán Lớp 8: Rút gọn : x^n-1 (x+y) – y(x^n-1+ y^n-1)
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Toán Lớp 8: Rút gọn : x^n-1 (x+y) – y(x^n-1+ y^n-1)
Comments ( 2 )
& = {x^n} + {x^{n – 1}}y – {x^{n – 1}}y – {y^n} \cr
& = {x^n} – {y^n} \cr} \)