若|2x-4|+3|4y-6|=0,求|x-y|和-（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 若2x-3y=0,求5x+4y/3x-2y 若x+y^2-8y-6y+25=0,试求3x+4y的值xiexie! 若|2x-4|+3|4y-6|=0,求|x-y|和-（x+y）的值 若x^2+6x+y^2-4y+13=0 求x y的值还有3天 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！ 若(-x+6):(x-y):(4x+y)=3:14:1,求x+y 若(-x+6):(x-y):(4x+y)=3:14:1,求x+y 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 若x≥0,y≥0,且2x+3y≤100,2x+y≤60,求z=6x+4y的最大值? 若根号下x^2-4x+3加上/y^2-5y-6/=0,且x>y,求x+y 若x^2-4x+y^2-10y+29=0,求x^2y^2+2x^3y^2+x^4y^2的值 (x+y)/2+(x-y)/3=6 4(x+y)-3(x-y)=－2 0 求x,y分可以加. 已知x^3+xy^2+x+x^2y+y^3+y=0,求5x-6y/3x+4y的值. 若|x-1|+|y-3|=0,求1/xy+1/(x+2)(y+2)+1/(x+4)(y+4)+1/(x+6)(y+6）.+1/(x+2010)(y+2010)的值x=1,y=3, 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