x⁴-2x²y-3y²+8y-4
来源：学生学帮网 编辑：学帮网 时间：2024/06/30 08:51:50
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+y-2）
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+y-2）