x的平方-12xy+36 y的平方-6x+36y+8怎么做
问题描述:
x的平方-12xy+36 y的平方-6x+36y+8怎么做
答
x^2-12xy+36y^2-6x+36y+8
=(x-6y)^2-6(x-6y)+8 (将x-6y看成整体)
=(x-6y-2)(x-6y-4)