(2X+3)(X-4)-2(X+2)(X-3)
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(2X+3)(X-4)-2(X+2)(X-3)
(2X+3)(X-4)-2(X+2)(X-3)
(2X+3)(X-4)-2(X+2)(X-3)
=2x-8x+3x-12-2x+6x-4x+12,=-3x
(x-4)(2x+3)-(x+2)(x-3)
=(2x²-5x-12)-(x²-x-6)
=x²-4x-6
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-3x
8
-3x
原式=(2x²-8x+3x-12)-2(x²-3x+2x-6)
=2x²-5x-12-2x²+x+12
=-4x
-3X
-3x
-3x
化简得—3x要有过程
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