将下列各式分解因式:(1)x2-9x; (2)2x2-12x+18; (3)8(x2-2y2)-x(7x+y)+xy.
题型:解答题难度:一般来源:不详
将下列各式分解因式: (1)x2-9x; (2)2x2-12x+18; (3)8(x2-2y2)-x(7x+y)+xy. |
答案
(1)x2-9x=x(x-9);
(2)2x2-12x+18, =2(x2-6x+9), =2(x-3)2;
(3)8(x2-2y2)-x(7x+y)+xy, =8x2-16y2-7x2-xy+xy, =x2-16y2, =(x+4y)(x-4y). |
举一反三
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