因式分(1)ax2-16ay2.(2)-2a3+12a2-18a;(3)4+12(x-y)+9(x-y)2.
题型:解答题难度:一般来源:不详
因式分 (1)ax2-16ay2. (2)-2a3+12a2-18a; (3)4+12(x-y)+9(x-y)2. |
答案
(1)ax2-16ay2, =a(x2-16y2), =a(x+4y)(x-4y);
(2)-2a3+12a2-18a, =-2a(a2-6a+9), =-2a(a-3)2;
(3)4+12(x-y)+9(x-y)2, =[2+3(x-y)]2, =(3x-3y+2)2. |
举一反三
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