分解因式:(1)-5a2+25a3-5a          (2)3x3-12xy2(3)2a3b+8a2b2+8ab3(4)a2(x-y)+4b2(y-x) 

分解因式:(1)-5a2+25a3-5a          (2)3x3-12xy2(3)2a3b+8a2b2+8ab3(4)a2(x-y)+4b2(y-x) 

题型:解答题难度:一般来源:不详
分解因式:
(1)-5a2+25a3-5a          
(2)3x3-12xy2
(3)2a3b+8a2b2+8ab3
(4)a2(x-y)+4b2(y-x)               
(5)(x-1)(x-3)+1.
答案
(1)原式=-5a(a-5a2+1);

(2)原式=3x(x2-4y2
=3x(x-2y)(x+2y);

(3)原式=2ab(a2+4ab+4b2
=2ab(a+2b)2

(4)原式=a2(x-y)-4b2(x-y)
=(x-y)(a2-4b2
=(x-y)(a-2b)(a+2b);

(5)原式=x2-4x+3+1
=x2-4x+4
=(x-2)2
举一反三
分解因式:
(1)4x2y-xy3
(2)(xy-1)(xy-3)+1.
题型:解答题难度:一般| 查看答案
用因式分解进行计算
(1)
2009
20092-2008×2010
(2)2.5×19.7+3.24×25+2.5×47.9.
题型:解答题难度:一般| 查看答案
因式分
(1)x3-25x                       (2)x2+4x+4                         (3)-3mn2+12mn-12m
(4)(x2-6)2-6(x2-6)+9        (5)9x2(a-b)+y2(b-a)            (6)y2-y-20.
题型:解答题难度:一般| 查看答案
利用因式分解计算:(1-
1
22
)(1-
1
32
)(1-
1
42
)…(1-
1
92
)(1-
1
102
)
题型:解答题难度:一般| 查看答案
x(x-y)2-y(y-x)2可化为(  )
A.(x-y)2B.(x-y)3C.(y-x)2D.(y-x)2
题型:单选题难度:简单| 查看答案
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