分解因式:(1) 9x+1/4+81x^2 (2) -m^2n^2-16+8mn (3) (y+2 5
分解因式:(1)9x+1/4+81x^2(2)-m^2n^2-16+8mn(3)(y+2)x^2+(y+2)x-12y-24...
分解因式:(1) 9x+1/4+81x^2
(2) -m^2n^2-16+8mn
(3) (y+2)x^2+(y+2)x-12y-24 展开
(2) -m^2n^2-16+8mn
(3) (y+2)x^2+(y+2)x-12y-24 展开
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