化简这个等式:4x×4y-(x-2y-y)×(4x-2x-x)
(x-2y)²+(2x-4y)(x+y)+(x+y)²
化简算式(4x-2y²)-[5x-(x-y²)]-x
1.((y+2x)(-2x+y)+4(x+2y)^2)/3y 2.(2(x-y)^3-8(x-y)^2(x+y)+6y(
3(x-y)-2(x+y)-5(x-y)+4(x+y)+3(x-y) 化简合并同类项
(X-3Y)(X+3Y)-(X+2Y)(X-4Y)-(2X-Y)2的平方
化简求值:【(x+Y)(X-Y)-(X-Y)的平方+2Y(2-Y)】除4Y,其中X=1 Y=2
x^2-y^2/x+y-4x(x-y)+y^2/2x-y,
已知:x,y满足等式(√x-2y-4 )+ (2x-3y-7)2=0,求7x三次方-8y的平方根
一、 化简求值1 (x-2-(12)/(x+2))/(4-x)/(x+2)2【(x-y)²+(x+y)(x-y
化简求值(x+5y)(x+4y)-(x-y)(x+y),其中x=一又2/5,y=-1/7
(3x-y)²-2x(4x-5y)-(x+2y)²
计算:(3x-4y)-[-(2y+x)+(x-3y)]-6x