若x^2+4x+y^2-6Y+13=0,则（x+2y）(x-2y)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x^2+y^2+13-4x+6y=0,求(2x-y)^2-2(2x-y)(x+2y)+(x+2y)^2 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 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！ x^2+y^2+6x-4y+13=0求x,y,x^2-y^2的值 如果有理数x.y满足x^2+y^2+4x-6y+13=0,则y^x=? x平方-4x+2y+6y+13=0则x= y=? 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+y^2-4x+6y+13=0,x,y的值 x^2-4x+y^2-6y+13=0求x,y的值 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 若x^2+y^2-4x+6y+13=0,求x-yRT 已知x、y满足x2+y2-4x+6y+13=0 求代数式（3x+y)2-3(3x-y)(x+y)-(x-3y)(x+3y)已知x、y满足x^2+y^2-4x+6y+13=0 求代数式（3x+y)^2-3(3x-y)(x+y)-(x-3y)(x+3y)的值 若2x-3y+4=0则x（x*x-1)+x(5-x*x)-6y+7 若实数X,Y满足X²+Y²+4X-2Y +1=0,则X²-6X+Y²-2Y的最大值是多少 若（x^2）-6x+（y^2）+4y+13=0 则x=?,y=?