几道初一计算题 (5 16:27:18)

1.18a²x²+24a²x²y+8x²y²
=2x²(9a²+12a²y+4y²)
=2x²(3a+2y)²
2.(3-x/2-x)/ [x+2-(5\x-2)]
=(3-x/2-x)/ (x²-4-5/2)
=(3-x/2-x)*(x-2)/(x+3)(x-3)
=-1/x+3
3.3y-2/y-1-y+1/1-y=2
3y-2+y+1=2y-2
2y=-1
y=-0.5