Question

Bài 1

1) (x^2-2x+3)*(x-4)

2) (2x^2-3x-1)*(5x+2)

3) (x^2-2xy+y^2)*(y^2+2xy+x^2+1)

4) (x-7)*(x+5)*(x-5)

5) (x+2y)*(x-y)

6) (x+5)*(x^2-2x+3)

7) 2x(x+5)*(x-1)

8) (x-2y)*(x+2y)

9) (x-1)*(x^2+x+1)

10) (1-2x^2+x)*(x-4+x^2)