题目内容
把下列各式分解因式1.x4+3x2-4.
2.(x+9)2-16x2.
3.(a+b)m+3-(a+b)m+1(m为正整数).
4.a2x2+2a2yx+a2y2-a4.
5.(y-x)2+5(x-y)+6.
6.x2+y2+m2-2xy+2my-2mx.
7.1-xy(F11-xy)-x3y3.
8.(x+1)(x+2)(x+3)(x+4)-3.
答案:
解析:
解析:
1.(x2+4)(x+1)(x-1)
2.(5x+9)(9-3x) 3.(a+b)m+1(a+b+1)(a+b-1) 4.a2(x+y+a)(x+y-a) 5.(x-y+3)(x-y+2) 6.(x-y-m)2 7.(1-xy)(1+x2y2) 8.(x2+5x+7)(x2+5x+3)
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