若实数x,y满足(x-y-5)²+│2x+3y+20│=20,求3x+2y+1的值.
已知实数x、y满足5x²-3xy+1/2y²-2x+1/2y+1/4=0 求x、y的值
设实数x、y满足方程2x²+3y²=6y,求x+y的最大值
已知实数x,y满足方程(x²+2x+3)(3y²+2y+1)=4/3,求x+y的值
若实数x,y满足(x-y-5)的平方+/2x+3y+20/=0,求3x+2y+1的值
若实数x,y满足2x²+3y²=1,S=3x²-2y²,则S的取值范围是多少
已知实数x,y 满足y=根号(3-x²).试求m=(y+1)/(x+3),b=2x+y的取值范围
实数x,y满足3x²+2y²=6x,求x²+y²的最小值和最大值
已知实数X,Y满足根号x-3y-1+(x-2y-2)²=0,求2x+y的平方根
若实数x,y满足y=√(4-x²)+2√(x²-4)+8/(x+2),求y的x次方的值
已知实数x,y,满足x²+y²-2x+4y+5=0,试求x,y的值 已知x(x+1)(x+2)(x+
已知x,y是有理数,且满足(2x-y+1)²+|5x-2y-3|=0,求x,y的值.
求代数式3x²y+5x-0.5x²y+3.5x²y-2的值,其中x=1/5,y=7