- a2÷b•1b÷c•1c÷d•1d等于______.
- 计算:(-4x2y3w)3=______.
- 化简的结果是( ) A. B.a C.a-1 D.
- 计算÷(-)•的结果是( ) A.-y B. C. D.
- 计算:(xy-x2)•xyx-y=______.
- 填空:(a-b)•______=a2-b2ab.
- 计算:(1)-3mn÷2n23m(2)x2-2x+1x2-1÷x-1x2+x(3)2m-64-4m+m2•m2+6m+93-m.
- 计算:1x2-x•x-1x=______.
- 化简的结果是( ) A.-a-1 B.-a+1 C.-ab+1 D.-ab+b
- 化简xx2-3x•(x2-9)
- 化简:xx-1•x2-1x2.
- 化简:x2-6x+99-x2÷2x-6x2+3x
- 把分式xy2x2-18化成两个分式的乘积的形式.
- 化简:x2-2x+1x2-1÷x-1x2+x
- 计算:a-ba+2b÷a2-b2a2+4ab+4b2.