(3x-2y)(9x^2+4y^2)(3x+2y)等于什么
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(3x-2y)(9x^2+4y^2)(3x+2y)等于什么(3x-2y)(9x^2+4y^2)(3x+2y)等于什么(3x-2y)(9x^2+4y^2)(3x+2y)等于什么(3x-2y)(3x+2y
(3x-2y)(9x^2+4y^2)(3x+2y)等于什么
(3x-2y)(9x^2+4y^2)(3x+2y)等于什么
(3x-2y)(9x^2+4y^2)(3x+2y)等于什么
(3x-2y)(3x+2y)(9x^2+4y^2)
=[(3x-2y)(3x+2y)](9x^2+4y^2)
=(9x^2-4y^2)(9x^2+4y^2)
=[(9x^2-4y^2)(9x^2+4y^2)]
=81x^4-16y^4
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81X^4-16y^4
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9y=3x-(x-1),4(x+y)-(2x+4)=8y
根据3(x+y)-2(x-y)=11,4(x+y)+3(x-y)=9可得出x+y= ,x-y=
计算:x+2y/x-y+2x/y-x-3y/x-y