已知x²+y²+4x-6y+13=0,求x²+3y²分之x²-2x的值
已知x²+y²+4x-6y+13=0,求x²+3y²分之x²-2x的值
已知x²+4y²-6x+8y+13=0,求x-y/x+y的值.
解已知x²+y²+6x-4y+13=0,求(y-x分之1)÷(x-y分之1)的值
已知x-3y=0,y≠0,求x²-2xy+y²分之2x+y×(x-y)的值
已知|x-y-根号3|+(x-2y²)=0,求2分之x+y²的值?
已知y-2x=0,求3x²-2y²/(x+y)(x-y)的值
已知x,y满足x²+y²-4x+6y+13=0则(3x+y)²-(3x+y)(3x-y)的
已知x+3y=0,求x³+3x²y-2x-6y的值.
已知x²+y²+13-4x+6y=0,求(2x-y)²-2(2x-y)(x+2y)+(x+
已知x,y的值满足方程组x+2y=3,x-y=-2,求x/(x-y)²+x²-y²/(x+
已知x²+4y+y²—6y+13=0,求2x+3y的值
已知非零有理数x,y满足x²-4xy+4y²=0,求x-y/x+y-y-x/x+y的值.