Toán Lớp 9: (x+1)(x² + x + 1)(x-1)(x²-x+1)
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Toán Lớp 9: (x+1)(x² + x + 1)(x-1)(x²-x+1)
cô đang gọi mình
Comments ( 2 )
=[(x+1)(x^2-x+1)][(x-1)(x^2+x+1)]+1
=(x^3+1^3)(x^3-1^3)
=x^6-x^3+x^3-1
=x^6-1