Toán Lớp 7: Làm tính nhân
a)2x^n+1.(x^n-1 – y^n-1)+y^n-1.(2x^n+1 – y^n+1)
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Toán Lớp 7: Làm tính nhân
a)2x^n+1.(x^n-1 – y^n-1)+y^n-1.(2x^n+1 – y^n+1)
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