分解因式x²-y²-3x-3y
来源：学生作业帮助网 编辑：六六作业网 时间：2024/11/16 04:28:43
分解因式x²-y²-3x-3y分解因式x²-y²-3x-3y分解因式x²-y²-3x-3yx²-y²-3x-3y=x&#
分解因式x²-y²-3x-3y
分解因式x²-y²-3x-3y
分解因式x²-y²-3x-3y
x²-y²-3x-3y=x²-y²-3(x+y)
=(x+y)(x-y)-3(x+y)
=(x+y)[(x-y)-3]
=(x+y)(x-y-3)
原式=(x+y)(x-y)-3(x+y)
=(x+y)(x-y-3)
x²-y²-3x-3y
=(x²-y²)-(3x+3y)
=(x+y)(x-y)-3(x+y)
=(x+y)[(x-y)-3]
=(x+y)(x-y-3)