求圆x^2+y^2-8x-4y+16=0上点到直线4x+3y+10=0距离的最值

已知x^2-8x+y^2-y+16又1/4=0,求[(x+y)(x-y)-(x+y)^2-2y(x-3y)]÷4y的值 已知x*x-4xy+4y*y=0 求[2x(x+y)-y(x+y)]/(4x*x-4xy+y*y)的值? 已知x.x+y.y+8x+6y+25=0,求代数式(x.x-4y.y)/(x.x+4xy+4y.y)-x/(x+2y)的值 x*x+2x-y*y+6y-8=0,x+y不等于2,求x-y的值 已知X*X+Y*Y+6X-8Y+25=0 求（Y/X)+(X/Y)-2=? x^2+2x+y^2-8y+16=0,求y/x的值 x^+2x+1+y^2-8y+16=0求y/x 已知x^2+4y^2-4x+8y+8=0,求x+y 求x ,y 9x^2+4y^2-12x-8y+8=0 已知x^2+y^2-16x-8y+25=0,求y/x-x/y的值 若(x*x+y*y)(x*x+y*y)-4x*x*y*y=0,求代数式(x*x+5xy+y*y)/(x*x+2xy+y*y)的值 x*x+4y*y+2x*x-4y+2=0求根号下5x*x+16y*y的值快啊 已知x求^2+y^2-6x-8y+25=0求1/x-y /x+y/x^4-y^4 已知x^2+4y^2-2x-2x+8y+5=0,求x^2-y^2/2x^2+xy-y^2*2y-y/xy-y/(x^2+y^2/y)^2的值 x*x+y*y-2x+4y+5=0求x, 已知x²+4y²+8x-4y+17=0求2x+16y=? 若x*x+4*y*y+2*x-4*y+2=0,求5*x*x+16*y*y的算术平方跟 x-2y+3=0 求x^2-(4y+1)x+4y^2+8y