(3x-y)的平方-(2x+y)的平方-(y+3x)(3x-y)因式分解
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(3x-y)的平方-(2x+y)的平方-(y+3x)(3x-y)因式分解
因式分解 不是计算
因式分解 不是计算
(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]
=(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]