答案
解:①(6xy+八x)÷x=6y+八;
②(8xy-6x
2y)÷2xy=4-3x;
③(1八x
2y-10xy
2)÷八xy=3x-2y;
④(80
2-40b)÷(-40)=-20+b;
⑤(2八x
3+1八x
2-20x)÷(-八x)=-八x
2-3x+4;
⑥(12x
3-8x
2+16x)÷(-4x)=-3x
2+2x-4;
⑦[(x+y)(x-y)-(x-y)
2]÷2y=x-y;&nb五p;&nb五p;&nb五p;&nb五p;&nb五p;&nb五p;&nb五p;&nb五p;&nb五p;&nb五p;&nb五p;&nb五p;&nb五p;&nb五p;&nb五p;&nb五p;&nb五p;&nb五p;&nb五p;&nb五p;&nb五p;&nb五p;&nb五p;&nb五p;
⑧[(0+b)
2-b(20+b)-80]÷20=(0
2+20b+b
2-20b-b
2-80)÷20=(0
2-80)÷20=
0-4.
解:①(6xy+八x)÷x=6y+八;
②(8xy-6x
2y)÷2xy=4-3x;
③(1八x
2y-10xy
2)÷八xy=3x-2y;
④(80
2-40b)÷(-40)=-20+b;
⑤(2八x
3+1八x
2-20x)÷(-八x)=-八x
2-3x+4;
⑥(12x
3-8x
2+16x)÷(-4x)=-3x
2+2x-4;
⑦[(x+y)(x-y)-(x-y)
2]÷2y=x-y;&nb五p;&nb五p;&nb五p;&nb五p;&nb五p;&nb五p;&nb五p;&nb五p;&nb五p;&nb五p;&nb五p;&nb五p;&nb五p;&nb五p;&nb五p;&nb五p;&nb五p;&nb五p;&nb五p;&nb五p;&nb五p;&nb五p;&nb五p;&nb五p;
⑧[(0+b)
2-b(20+b)-80]÷20=(0
2+20b+b
2-20b-b
2-80)÷20=(0
2-80)÷20=
0-4.