x²+3xy+2y-x+y-6因式分解
问题描述:
x²+3xy+2y-x+y-6因式分解
答
x²+3xy+2y²-x+y-6
=(x+y)(x+2y)-x+y-6
=(x+y+2)(x+2y-3)
十字相乘
x+y 2
×
x+2y ﹣3