A(-x+y)(x-y)B(x-y)(y-x)C(x+y)(x-2y)D(x+y)(-x+y)这些哪个能用平方差公式计算
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A(-x+y)(x-y)B(x-y)(y-x)C(x+y)(x-2y)D(x+y)(-x+y)这些哪个能用平方差公式计算
A(-x+y)(x-y)B(x-y)(y-x)C(x+y)(x-2y)D(x+y)(-x+y)这些哪个能用平方差公式计算
A(-x+y)(x-y)B(x-y)(y-x)C(x+y)(x-2y)D(x+y)(-x+y)这些哪个能用平方差公式计算
解;
平方差公式;(a+b)(a-b)=a²-b²
A(-x+y)(x-y)
B(x-y)(y-x)
C(x+y)(x-2y)
D(x+y)(-x+y)
A-(x-y)(x-y)不是
B(x-y)[-(x-y)]不是
C肯定不是
D(x+y)[-(x-y)]=y²-x²是
选D
因式分解,(a-b)(x-y)-(b-a)(x-y)(a-b)(x-y)-(b-a)(x+y)
通分x/a(x-y),y/b(y-x) 通分 a/(y-x)的平方,b/(x-y)*(x+y)
8a(x-y)平方-4b(y-x)
如何解因式分解x(x-y)(a-b)-y(y-x)(b-a)
(x+y)-(a-b)(x+y)因式分解
因式分解 a(y-x)-b(x-y)
(5)a(x+y)-b(x+y)-x-y因式分解
通分:-x/a(x-y) ,y/b(y-x)
通分x/a(x-y),y/b(y-x)
通分 a/(y-x)^2,b/(x-y)(x+y)
因式分解a(x-y)+b(y-x)+(2x-y)
因式分解a(x-y)+b(y-x)+c(x-y)
通分 a(x-y)分之x,b(y-x)分之y
分解因式a(x-y)-b(y-x)+c(x-y)
分解因式 a(x-y)+b(y-x)+c(x-y)
设集合A={(x,y)|y≥|x-2|,x>=0},B ={(x,y)|y
a(x-y)(x+y)-b(y-x)(x+y)-c(x-y)^2(y+x)提取公因式
A(-x+y)(x-y)B(x-y)(y-x)C(x+y)(x-2y)D(x+y)(-x+y)这些哪个能用平方差公式计算