发布网友 发布时间:2024-10-24 03:43
共2个回答
热心网友 时间:2024-11-15 19:38
x^4+y^4
=x^4+2x^2y^2+y^4-2x^2y^2
=(x^2+y^2)^2-2x^2y^2
=(x^2+y^2-xy√2)(x^2+y^2+xy√2)
热心网友 时间:2024-11-15 19:33
x^4+4y^4
=x^4+4x^2y^2+4y^4-4x^2y^2
=(x^2+2y^2)^2-4x^2y^2
=(x^2+2y^2+2xy)(x^2+2y^2-2xy)