因式分解x^2-6xy+9y^2-10x+30y+25
问题描述:
因式分解x^2-6xy+9y^2-10x+30y+25
答
x^2-6xy+9y^2-10x+30y+25
=(x-3y)^2-10(x-3y)+25
=(x-3y-5)^2