分解因式:(1)a4-16;(2)x2-2xy+y2-9.
题型:解答题难度:一般来源:不详
分解因式: (1)a4-16; (2)x2-2xy+y2-9. |
答案
(1)a4-16=(a2)2-42, =(a2-4)(a2+4), =(a2+4)(a+2)(a-2);
(2)x2-2xy+y2-9, =(x2-2xy+y2)-9, =(x-y)2-32, =(x-y-3)(x-y+3). |
举一反三
因式分解 (1)-8ax2+16axy-8ay2; (2)(a2+1)2-4a2. |
分解因式 (1)a2(x-y)+16(y-x); (2)(x2+y2)2-4x2y2. |
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