y-2x+1是4xy-4x^2-y^2-k的一个因式,则的k值是?
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y-2x+1是4xy-4x^2-y^2-k的一个因式,则的k值是?
y-2x+1是4xy-4x^2-y^2-k的一个因式,则的k值是?
y-2x+1是4xy-4x^2-y^2-k的一个因式,则的k值是?
我也不知道我做得对不对,很抱歉我不知道那个小A是怎么写上去的,所以你凑合着看看吧.
你写的A后面的2是大的,我想应该是2y然后A次方吧
因为前式是后式的因式,所以(y-2x+1)的二次方应该和后一个因式有相同的地方,算出后为:y方减4xy加2x方减4x加2y加1
提出一个负号后,就与后因式相差无几了
k=2y+1-4x
当y-2x+1=0时
2x-y=1
4xy-4x^2-y^2-k=0
-(2x-y)^2-k=0
则k=-1
K=-1
-1
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x-2xy-1+4y²