(3x-2y)2(3x+2y)2(9x2+4y2)2.
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(3x-2y)2(3x+2y)2(9x2+4y2)2.
![(3x-2y)2(3x+2y)2(9x2+4y2)2.](/uploads/image/z/1992829-13-9.jpg?t=%EF%BC%883x-2y%EF%BC%892%EF%BC%883x%2B2y%EF%BC%892%EF%BC%889x2%2B4y2%EF%BC%892%EF%BC%8E)
原式=[(3x-2y)(3x+2y)]2(9x2+4y2)2
=(9x2-4y2)2(9x2+4y2)2
=[(9x2-4y2)(9x2+4y2)]2
=(81x4-16y4)2.
=(9x2-4y2)2(9x2+4y2)2
=[(9x2-4y2)(9x2+4y2)]2
=(81x4-16y4)2.
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