25(x^4)-9(y^2)=(5x^2+3y)(5x^2-3y)
(x^2+y^2)^2-4x^2y^2=(x^2+y^2-2xy)(x^2+y^2+2xy)=(x-y)^2(x+y)^2
x^5-x/3+1/36=x^5-x^2+x^2-x/3+1/36=x^2(x-1)(x^2+x+1)+(x-1/6)^2
25(x^4)-9(y^2)
=(5x^2+3y)(5x^2-3y)
(x^2+y^2)^2-4x^2y^2
=(x^2+y^2+2xy)(x^2+y^2-2xy)
=(x+y)^2(x-y)^2
x^5-x/3+1/36
内容全部来源于网络收集，如有侵权，请联系网站删除：QQ：24596024