第1个回答 2011-09-04
(一)144(x^2-1)^2-100x^2
=4{[6(x²-1)]²-(5x)²}
=4[6(x²-1)+5x]*[6(x²-1)-5x]
=4(6x²+5x-6)(6x²-5x-6)
=4(2x+3)(3x-2)(2x-3)(3x+2)
(二)(X^2+Y^2)(x^2-xy+y^2)-2·x^2·y^2
=(x²+y²)²-xy(x²+y²)-2(xy)²
=(x²+y²-2xy)(x²+y²+xy)
=(x-y)²(x²+xy+y²)
(三)(x^2+6x+6)^2+x^2+6x+4
=(x²+6x+6)²+(x²+6x+6)-2
=(x²+6x+6+2)(x²+6x+6-1)
=(x²+6x+8)(x²+6x+5)
=(x+4)(x+2)(x+5)(x+1)
希望能帮到你O(∩_∩)O