（2009·湖南怀化）因式分解：3a?6ab?3b? ． （2009·广西南宁）把多项式2x?8x?8分解因式，结果正确的是（ ） A．?2x?4?
2222
B．2?x?4?
2
C．2?x?2?
2
D．2?x?2?
2（2009·安徽省）因式分解：a2?b2?2b?1? ． （2009·广东省）分解因式2x3?8x=_______________________. （2009·浙江湖州）分解因式：a?4a= ． （2009·浙江嘉兴）因式分解：(x?y)2?3(x?y)? ▲ （2009·贵州安顺）因式分解：a?ab______________。
（2009·浙江温州）把多项式x一4x+4分解因式，所得结果是( )
2 2
A．x(x一4)+4 B.(x一2)(x+2) C．(x一2) D．(z+2) （2009·福建福州）分解因式：x?2x= （2009·山东威海）分解因式：(x?3)?(x?3)?___________． （2009·湖南长沙）因式分解：2a?4a? ． （2009·北京市）把x?2xy?xy分解因式，结果正确的是 A.x?x?y??x?y? B.xx?2xy?y232222
33222?2? C.x?x?y? D.x?x?y?22
（2009·湖北恩施）分解因式：2a?8a= . （2009·广东中山）分解因式：x2-y2-3x-3y=____________________. （2009·四川内江）分解因式：?x?2x?x? ．
323（2009·湖北黄冈）分解因式：6a3?54a=________;
（2009·四川眉山）下列因式分解错误的是( A．x?y?(x?y)(x?y) C．x?xy?x(x?y)
222
2)
2
B．x?6x?9?(x?3)
D．x?y?(x?y)
222
（2009·四川内江）在边长为a的正方形中挖去一个边长为b的小正方形（a?b）（如图甲），把余下的部分拼成一个矩形（如图乙），根据两个图形中阴影部分的面积相等，可以验证（ ）
A．(a?b)?a?2ab?b
222a a b b 图甲
b a b 图乙
B．(a?b)?a?2ab?b C．a?b?(a?b)(a?b) D．(a?2b)(a?b)?a?ab?2b
（2009·四川凉山）分解因式9a?a? ，2x?12x?18? ． （2009·湖北孝感）已知：x?3?1，y?3?1，求下列各式的值. （1）x?2xy?y；（3分） （2）x?y．（3分）
（2009·福建漳州）给出三个多项式：
22222222222321211x?2x?1，x2?4x?1，x2?2x．请选择222你最喜欢的两个多项式进行加法运算，并把结果因式分解． 解：情况一：
2121·························································· 2分 x?2x?1?x2?4x?1 ·
22=x?6x ······································································································ 5分 =x(x?6)． ·································································································· 8分 情况二：
2121···································································· 2分 x?2x?1?x2?2x ·
22=x?1 ········································································································· 5分 =(x?1)(x?1)． ···························································································· 8分 情况三：
2121···································································· 2分 x?4x?1?x2?2x ·
22=x?2x?1 ·································································································· 5分 =(x?1)．
（2009·吉林省）在三个整式x?2xy,y?2xy,x中，请你任意选出两个进行加（或减）运算，使所得整式可以因式分解，并进行因式分解．
2222
2009涓�冭瘯棰樺垎绫?鍥犲紡鍒嗚В) - 鐧惧害鏂囧簱
