)-25 y-2y
-4x-4
0+4xy-16
D 3yx-6x'y+3xy
D&+1-4x
m) x-2x 15
4) -x-9% 9
Oxy-x'-xyz
D-y-2x+2y
BL2 Rit gọn biểu thức:
a) 2x-x)-3x( 2x -1)
b) (2x-3X2x+3) (2x-3)
) Sxyx-xy)-x'y(Sx-y)
d) (3xy+ 6xy'-12xy): 3xy
e) 2x(x+3)-x(2x-1)
0 (x+2)(x-2)+ x(5- x)
R) 2x-5x + 6x - 15): (2x -5)
00x-2yy-(3x+2y ...
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