因式分解（3x-y）²-(2x﹢y)²-(y+3x)(3x-y)

因式分解（3x-y）²-(2x﹢y)²-(y+3x)(3x-y)
因式分解（3x-y）²-(2x﹢y)²-(y+3x)(3x-y)

因式分解（3x-y）²-(2x﹢y)²-(y+3x)(3x-y)
原式=(3x-y+2x+y)(3x-y-2x-y)-(3x+y)(3x-y)
=5x(x-2y)-(3x+y)(3x-y)
=5x²-10xy-9x²+y²
=-4x²-10xy+y²
不能分解
这是计算题吧

（3x-y）²-(2x﹢y)²-(y+3x)(3x-y)
=(3x-y)(3x-y-y-3x)-(2x+y)²
=-(2x+y)²