f(x)=(x-1)(x^2+x+1)-x+1(x^2-x+1)

1 bình luận về “f(x)=(x-1)(x^2+x+1)-x+1(x^2-x+1)”

1. f(x)=(x-1)(x^2+x+1)-x+1(x^2-x+1)

         =x(x^2+x+4)-1(x^2+x+4)-x+x^2-x+1

         =x^3+x^2+4x-x^2-x-4-x+x^2-x+1

         =x^3+x^2-x^2+x^2+4x-x-x-x-4+1

         =x^3+x^2+x-3

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