
先化简再求值(2x-3y+5xy)-(x-4y-3xy),其中x+y=-3,xy=-4
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您好!
(2x-3y+5xy)-(x-4y-3xy)
=2x-3y+5xy-x+4y+3xy
=2x-x-3y+4y+5xy+3xy
=x+y+8xy
=(x+y)+8(xy)
=-3+8*(-4)
=-3-32
=-35
祝你学习进步O(∩_∩)O哈!
(2x-3y+5xy)-(x-4y-3xy)
=2x-3y+5xy-x+4y+3xy
=2x-x-3y+4y+5xy+3xy
=x+y+8xy
=(x+y)+8(xy)
=-3+8*(-4)
=-3-32
=-35
祝你学习进步O(∩_∩)O哈!
展开全部
(2x-3y+5xy)-(x-4y-3xy)
=2x - 3y + 5xy - x + 4y + 3xy
= x + y + 8xy
= -3 + 8*(-4)
= -35
=2x - 3y + 5xy - x + 4y + 3xy
= x + y + 8xy
= -3 + 8*(-4)
= -35
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(2x-3y+5xy)-(x-4y-3xy)
=x+y+8xy
=-3-8x4
=-35
=x+y+8xy
=-3-8x4
=-35
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你对这个回答的评价是?
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