我把y的系数改成7了,这样好像可以分解~`
你检查一下题目有没有输入错误?
x^2+3xy+y^2+5x+7y+6
=x²+(3y+5)x+(y²+5y+6)
=x²+(3y+5)x+(y+2)(2y+3)
=x²+[(y+2)+(2y+3)]x+(y+2)(2y+3)
=(x+(y+2))(x+(2y+3))
=(x+y+2)(x+2y+3)