(x y) 2(x y)-4(x y)的结果
{(z+y)(x-y)-(x-y)的2次方+2y(x-y)}除以4y
化简(-y-2/x)÷(x+2/y)的结果 【备用选项 A.-y/x B.-x/y C.x/y D.y/x 】 好了再加
计算[x-2y]4次方除以[2y-x]的二次方除以[x-2y]结果为?
已知x*x-4xy+4y*y=0 求[2x(x+y)-y(x+y)]/(4x*x-4xy+y*y)的值?
x^2-y^2/x+y-4x(x-y)+y^2/2x-y,
(m+n)(x-y)-(m+n)(x+y)的结果
(x-2y)(x-2y)(x平方+4y平方)的平方(x+2y)(x+2y)
(X-3Y)(X+3Y)-(X+2Y)(X-4Y)-(2X-Y)2的平方
把(x-y)看做一个整体,则-2分之一*(x-y)+二分之一(x-y)-(x-y)的平方+(x-y)可化简成什么结果?当
(2x-y)^2-4(x-y)(x+2y)
(2x-y)²-4(x-y)(x+2y)
化简:(2x-y)²-4(x-y)(x+y)