(3x+2y)²--(3x-2y)²
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(3x+2y)²--(3x-2y)²
![(3x+2y)²--(3x-2y)²](/uploads/image/z/19080361-1-1.jpg?t=%EF%BC%883x%2B2y%EF%BC%89%26%23178%3B--%EF%BC%883x-2y%EF%BC%89%26%23178%3B)
(3x+2y)²-(3x-2y)²
=(3x+2y+3x-2y)(3x+2y-3x+2y)
=6x*4y
=24xy
=(3x+2y+3x-2y)(3x+2y-3x+2y)
=6x*4y
=24xy
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