tarea del 2 trimestre

5(x-2y)=5x-10y
(x+2x)3xy=3xy+xy
(x-3)(x+5)=x+5x-3x-15=x2+2x-15
(x+7)(x-3)=x2-4x+7x-28=x2-11x2-28
(x-4)((x-3)=x2+3x-4x-12=x2-7x2-12
-4x(2x-3)=8x2+12x
tarea II

-18x3/9x=-2x2
-3x5/-2x2=-5x3
3x2-6xy-12x2/3x=1x-2xy-4x
-4x4+6x2+32x/-2x=6x3+3x+16
17x4/3x3=5.6x
12xy/628x2zy=52.3x