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. |
用因式分解进行计算 (1)(2)2.5×19.7+3.24×25+2.5×47.9. |
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. |
利用因式分解计算:(1-)(1-)(1-)…(1-)(1-). |
x(x-y)2-y(y-x)2可化为( )A.(x-y)2 | B.(x-y)3 | C.(y-x)2 | D.(y-x)2 |
|
最新试题
热门考点