分解因式：x方-10xy+25y方-6x+30y+8
问题描述：
分解因式：x方-10xy+25y方-6x+30y+8
答
x²-10xy+25y²-6x+30y+8
=(x-5y)²-6(x-5y)+8
=(x-5y-2)(x-5y-4)