
1个回答
展开全部
2x^2-8xy+5y^2
=2x^2-8xy+8y^2-8y^2+5y^2
=2(x^2-4xy+4y^2)-3y^2
=2(x-2y)^2-3y^2
=[√2(x-2y)-y√3][√2(x-2y)+y√3]
=(x√2-2y√2-y√3)(x√2-2y√2+y√3)
=2x^2-8xy+8y^2-8y^2+5y^2
=2(x^2-4xy+4y^2)-3y^2
=2(x-2y)^2-3y^2
=[√2(x-2y)-y√3][√2(x-2y)+y√3]
=(x√2-2y√2-y√3)(x√2-2y√2+y√3)
推荐律师服务:
若未解决您的问题,请您详细描述您的问题,通过百度律临进行免费专业咨询