求圆x^2+y^2-4x+4y+6=0截直线x-y-5=0所得的弦长.送上!

已知x^2+y^2+13-4x+6y=0,求(2x-y)^2-2(2x-y)(x+2y)+(x+2y)^2 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 已知：x^2+y^2+4x-6y+13=0,求x^y值. x^2+y^2+4x-6y+13=0,求x^y的值 x^2-4x+y^2-6y+13=0求x,y的值 若x^2+y^2-6x+4y+13=0 求x+y 因式分解 若 x^2+4x+y^2-6y+13=0 求y^x 已知：4x^2+y^2-4x-6y+10=0,求y/x-x/y的值 x^2+y^2+6x-4y+13=0求x,y,x^2-y^2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^2+4y^2-6x+4y+10=0,求x^4-y^4/(x+2y)(x-2y)*x+2y/xy^2+y^3除以（x^2+y^2/y)^2的值 化简求值：已知x、y满足：x^2+y^2-4x+6y+13=0 求代数式 的值.(3x+y)^2-3(3x-y)(x+y)-(x-3y)(x+3y)急用！ 已知x求^2+y^2-6x-8y+25=0求1/x-y /x+y/x^4-y^4 已知x²+y²-6x+4y+13=0,求(2x-y)²-2(2x-y)(x+2y)+(x+2y)²已知x²+y²-6x+4y+13=0,求(2x-y)²-2(2x-y)(x+2y)+(x+2y)² x*x+y*y-2x+4y+5=0求x, 已知x^2+y^2-2x-6y+10=0,求4(x^2+y)(x^2-y)-(2x^2-y)^2 (x+y)/2+(x-y)/3=6 4(x+y)-3(x-y)=－2 0 求x,y分可以加.