因式分【解析】
(a-b)2-(b-a)=___________.
若a-b=6,ab=7,则ab2-a2b的值为___________.
在括号前面添上“+”或“-”号:
(1)x-y=__________(y-x);
(2)(x-y)2=_________(y-x)2;
(3)(3-x)(5-x)=___________(x-3)(x-5);
(4)(a-b)3=__________(b-a)3;
(5)-x2+8x-16=____________(x2-8x+16).
写出下列各式分解因式时应提取的公因式:
(1)ax-ay应提取的公因式是________;
(2)3mx-6nx2应提取的公因式是__________;
(3)-x2+xy-xz应提取的公因式是___________.
分解因式:a2-5a =________.
已知(2x-10)(x-2)-(x-2)(x-13)可分解为(x+a)(x+b),则ab=( )
A. 8或- B. -8或- C. 8或 D. -8或