2X+6Y=10,2X+3Y=5.5,求x,
已知X-Y/X+Y=3,求代数式2(x-y)/X+Y-3X+Y/X+Y
已知x-y/x+y=3,求代数式5(x-y)/x+y-x+y/2(x-y)
2X+6Y=10,2X+3Y=5.5,求x,
当2x-y/x+y=3时,求代数式2x-y/2x+2y+x+y/6x-3y的值.
当2x-y\x+y=3时,求代数式2x-y/2x+2y+x+y/6x-3y的値.
x²-2x+y²+6y+10=0,求—9(x+y)²+(3x-2y)(2y+3x)的值
已知xy=-2,x-y=3,求(x+y)(x-y)-y^2+(x-y)^2-(6x^2y-2xy^2)÷2y
求函数y=\x-1\+\x-2\+\x-3\+\x-4\+\x-5\+\x-6\+.+\x-10\的最小值
已知2x-y=10,求[(x²+y²)-(x-y)²+2y(x-y)]/4y
【2(x-y)^3-8(x-y)^2(x+y)+6y(x-y)^2】/2(x-y)^2=
已知x^2+2x+y^2-6y+10=0 求(x+y)^2
X^2+y^2-2x+6y+10=0,求x+y的值