3x^2+5xy-2y^2-8x+5y-3 (用主元法或双十字相乘法)

2025-06-21 09:59:32
推荐回答(1个)
回答1:

3x^2+5xy-2y^2-8x+5y-3
=(3x-y)(x+2y)-8x+5y-3
=(3x-y+1)(x+2y-3)