(3x-y)的平方-(2x+y)的平方-(y+3x

(3x-y)的平方-(2x+y)的平方-(y+3x)(3x-y)因式分解

1个回答

（3x-y-2x-y)(3x-y+2x+y)-(3x+y)(3x-y)
=(x-2y)*5x-(3x+y)(3x-y)
=5x^2-10xy-9x^2+y^2
=y^2-10xy-4x^2
=[y-(5-√29)x][y-(5+√29)x]