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(6x+2y)-1/2(-2x-4y)
(2x-3)(x-2)
人气:307 ℃ 时间:2020-07-29 15:31:12
解答
(6x+2y)-1/2(-2x-4y)
=6x+2y+x+2y
=7x+4y
(2x-3)(x-2)
=2X2 -4x-3x+6
=2X2 -7x+6
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