(3x-2y)×(3x+2y)×(9x+4y)
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(3x-2y)×(3x+2y)×(9x+4y)(3x-2y)×(3x+2y)×(9x+4y)(3x-2y)×(3x+2y)×(9x+4y)前两个可以分为(3x-2y)(3x+2y)(3x-2y)(3x
(3x-2y)×(3x+2y)×(9x+4y)
(3x-2y)×(3x+2y)×(9x+4y)
(3x-2y)×(3x+2y)×(9x+4y)
前两个可以分为(3x-2y)(3x+2y)(3x-2y)(3x+2y)(9x^2+4y^2)^2=(9x^2-4y^2)(9x^2-4y^2)(9x^2+4y^2)^2=(81x^4-16y^4)^2
满意请采纳
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