问题
解答题
分解因式x4-2x2y-3y2+8y-4.
答案
原式=(x4-2x2y+y2)-(4y2-8y+4)=(x2-y)2-(2y-2)2
=(x2-y+2y-2)(x2-y-2y+2)
=(x2+y-2)(x2-3y+2).
分解因式x4-2x2y-3y2+8y-4.
原式=(x4-2x2y+y2)-(4y2-8y+4)=(x2-y)2-(2y-2)2
=(x2-y+2y-2)(x2-y-2y+2)
=(x2+y-2)(x2-3y+2).