已知x²+y²-10x-6y+34=0,求2x²-2y²分之4x²-8
已知x²+y²-10x-6y+34=0,求2x²-2y²分之4x²-8
已知实数x, y满足x²+y²-2x+6y+10=0,求y∧-x.
已知x/y=2,求2x(x+y)-y(x+y)/4x²-4xy+y²
已知x²+y²+13-4x+6y=0,求(2x-y)²-2(2x-y)(x+2y)+(x+
已知x²+y²+4x-6y+13=0,求x²+3y²分之x²-2x的值
已知x²+y²-8x+6y+25=0,求(x-y+4xy/x-y)(x+y-4xy/x+y)
已知x²+y²+5=2x+4y,求【2x²-(x-y)(x-y)】【(x+y-1)(x-y
已知x²+y²-2x+4y+5=0,求x+y
已知x²+4x+y-2y+5=0求x+2y
已知x²+4x+y²+6y+13=0,求x-y+(2y²/x+y) 请在10;20分前回答
已知x²+4y²-6x+8y+13=0,求x-y/x+y的值.
已知4x²+y²-4x-6y+10=0求(2/3x(√9x)+(y²√x/y³)