6x2-7xy-3y2怎么分解因式?
问题描述:
6x2-7xy-3y2怎么分解因式?
答
(2x-3y)(3x+y)
(2*1-3*3=-7)
答
2 -3
\/
/\
3 1
(2x-3y)(3x+y)=0