3x+4y-6=0 求8^x*16^y值

已知x.x+y.y-6x-8y+25=0,求3x.x+5y的值 知x²+4y²-8x-4y+17=0,x平方-5xy+6y平方/x²-16y²÷x-3y/x²-已知x²+4y²-8x-4y+17=0,求x平方-5xy+6y平方/x²-16y²÷x-3y/x²-4y²×x+4y/4y²-x²的值 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+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x²+y²+8x+6y+25=0,求x-4y/x+y的值 已知x²+4y²-6x+8y+13=0,求x-y/x+y的值. 已知x*x+y*y-4x-6y+13=0,求3x+4y的值 3x+4y-6=0 求8^x*16^y值 已知x²+y²+6x-2y+10=0,求8y分之9x²-y² + 4分之y-3x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！ 化简求值: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)的值 若x+y^2-8y-6y+25=0,试求3x+4y的值xiexie! (-x+6):(x-y);(4x+y)=3;14:1,求x+y的值. 已知4x+3y+5=0求3(8y-x)-5(x+6y-2)的值 已知x²+y²-8x-6y=25=0,求3x+4y的值 已知x²+y²-8x-6y+25=0,试求3x+4y的值.