将圆x∧2+y∧2-2x-4y+1＝0平分的直线是 A.x+y-1＝+0 B.x+y+3＝0 C.x-y+1＝0 D.x-y+3＝将圆x∧2+y∧2-2x-4y+1＝0平分的直线是A.x+y-1＝+0B.x+y+3＝0C.x-y+1＝0D.x-y+3＝0

将圆x∧2+y∧2-2x-4y+1＝0平分的直线是 A.x+y-1＝+0 B.x+y+3＝0 C.x-y+1＝0 D.x-y+3＝将圆x∧2+y∧2-2x-4y+1＝0平分的直线是A.x+y-1＝+0B.x+y+3＝0C.x-y+1＝0D.x-y+3＝0 将x∧4(x +1)∧2+ 4x∧3 y∧2+ 4y∧4因式分解, 将多项式(x+y)^2-4(x+y)+4因式分解 将(x-y)看成一个整体,将3(x-y)²-4(x-y)+7(x-y)-6(y-x)²-2(y-x)合并同类项. 将圆x^2+y^2-4y+3x=0 化成极坐标方程式 将圆X^2+y^2-4y+3x+0化成极坐标方程 将y(y+1)(x^2+1)+x(2y^2+2y+1)因式分解RT 怎么将y=x^-x/x^-x+1化简成（y-1）x^2+(1-y)x+y=0急 x-y/x+y=-1/2,x*x-xy-2y*y/x*x-3xy+2y*y的解是多少?同上,请将过程写出, 将（x-y)+2(x-y)-4(x-y) 化简结果 将圆x²+y²-2x-4y+1=0平分的直线是 x²/xy-x/y 3x/4x+y - x-2y/4x+y (1-y/y+x)÷x/y²-x² 将直线2X-Y+A=0,沿X轴向左平移1个单位,所得直线与圆X*X+Y*Y+2X-4Y=0相切,则实数A的值为多少? 已知实数x、y满足x∧2+y∧2+2x－4y+5＝0,求x、y的值 已知x－y＝1,y≠0,求｛(x＋2y)²＋（2x＋y）(x＋4y)－3(x＋y）（x－y)｝÷y的值. 设随机变量(X,Y)的概率密度为f(x,y)=1/2(x+y)e∧-(x+y),x>0,y>0.0其他.问X和Y是否相互独立,求Z=X+Y的概 {4x-3y-10=0 3x-2y=0,{3x-4(x-y)=2 2x-3y=1,{2(x+y)-(x-y)=3 (x+y)-2(x-y)=1 [(-x-y)(-x+y)-(x+y)^2-x(y-y^2)}÷1/2y