(4x-2y)-[-2(x-y)十(2x+y)]-4x其中x=0 y=-3

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(4x-2y)-[-2(x-y)十(2x+y)]-4x其中x=0 y=-3

(4x-2y)-[-2(x-y)十(2x+y)]-4x其中x=0 y=-3
(4x-2y)-[-2(x-y)十(2x+y)]-4x其中x=0 y=-3

(4x-2y)-[-2(x-y)十(2x+y)]-4x其中x=0 y=-3
(4x - 2y) - [ - 2(x-y) +(2x+y) ] - 4x
= 4x - 2y - [ -2x + 2y + 2x + y ] - 4x
= - 2y - 3y
= - 5y
= - 5 * (-3)
= 15
满意请采纳o(∩_∩)o

(4x-2y)-[-2(x-y)十(2x+y)]-4x=-4(希望能帮到你,麻烦点击 “好评”,谢谢你^_^)

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