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![](https://blog.hocmai.vn/wp-content/uploads/2017/07/hot.gif)
a)(2x+1)(3x-2)+x(7-6x)=21
b)(x^2+x+1)(x-1)=x^2(x-9)+2x-3
c)13-(3x^2+5x-8)(2x-1)=(2x^2-3x+1)(x+3/8)-6x
d) (2x+4)(x^2-4x-5)+2x-3=4x-2(x-5)(x^2+3x+2)
b)(x^2+x+1)(x-1)=x^2(x-9)+2x-3
c)13-(3x^2+5x-8)(2x-1)=(2x^2-3x+1)(x+3/8)-6x
d) (2x+4)(x^2-4x-5)+2x-3=4x-2(x-5)(x^2+3x+2)