数学七年级上册练习册9.13答案 急急急急急急急????????!!!!!!!!!!!!!!!!!!!!
题目(x+y)'2-(x+y)'3(x+y)2(x-y)+(x+y)(x-y)22a(a-3)2-6a2(3-a)+8a(a-3)24xy2z2(x+y+z)-32xyz...
题目 (x+y)'2 - (x+y)'3
(x+y)2(x-y)+(x+y)(x-y)2
2a(a-3)2-6a2(3-a)+8a(a-3)
24xy2z2(x+y+z)-32xyz(z-x-y)2+8xyz3(z-x-y)
4ab(a+b)2-6a2b(a+b) 展开
(x+y)2(x-y)+(x+y)(x-y)2
2a(a-3)2-6a2(3-a)+8a(a-3)
24xy2z2(x+y+z)-32xyz(z-x-y)2+8xyz3(z-x-y)
4ab(a+b)2-6a2b(a+b) 展开
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