(x-y+x-y分之4xy)(x+y-x+y分之4xy)的结果等于几啊?
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(x-y+x-y分之4xy)(x+y-x+y分之4xy)的结果等于几啊?
(x-y+x-y分之4xy)(x+y-x+y分之4xy)的结果等于几啊?
(x-y+x-y分之4xy)(x+y-x+y分之4xy)的结果等于几啊?
[(x-y)+4xy/(x-y)][(x+y)-4xy/(x+y)]
=[(x-y)^2+4xy]/(x-y)*[(x+y)^2-4xy]/(x+y)
=(x+y)^2/(x-y)*(x-y)^2/(x+y)
=(x-y)(x+y)
x^2-y^2
(x-y+x-y分之4xy)(x+y-x+y分之4xy)的结果等于几啊?
【x-y-(x-y分之4y平方)】【x+y-(x+y分之4x平方)】除以【3(x+y)-x-y分之8xy】
(x-y+4xy/x-y)(x+y-4xy/x-y)
(1)ac分之2bc (2)xy²分之(x+y)y (3)(x+y)^2/x^2+xy (4)(x-y)^2/x^2-y^2
(√xy -xy分之x+√xy)除以√xy -y分之x-y(x>0,y.0)
(xy-x²)·x²分之x-y
计算:(xy-x²)乘 x-y分之xy
(xy-x的平方)÷xy分之x-y
(xy-x的平方)*x-y分之xy=
根号x-根号y分之x+y-x根号y-y根号x分之2xy
若x+y=4,xy=3求x分之y+y分之x
计算:(xy分之x+y)方-x方y方分之x方-y方
(x分之x-y)-(y分之x+y)+(2xy分之x的平方-y的平方)
4分之x平方+xy+y平方
x平方+y平方+2xy分之x平方-4y平方除以x平方+xy分之2y+x
x²+y²+2xy分之x²-4y² ÷x²+xy分之2y+x
x+2y分之x-y/x² + 4xy+4y²分之x²-y²
(根号x-根号y)分之(x+y)-(x根号y-y根号x)分之(2xy)