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已知x,y满足x²+y²-4x+6y+13=0则(3x+y)²-(3x+y)(3x-y)的
# define ABS_MOD(x,y) (((x) < 0) ((((x) % (y)) + (y)) % (y))
已知x,y满足:x平方+y平方-4x+6y+13=0求(3x+y)-3(3x-y)(x+y)-(x-3y)(x+3y)=
已知x*x-4xy+4y*y=0 求[2x(x+y)-y(x+y)]/(4x*x-4xy+y*y)的值?
已知x*x+y*y-4x-6y+13=0,求3x+4y的值
若x*x+y*y-4x+16y+13=0 ,则x=____ y=____
已知x²+4y²-6x+8y+13=0,求x-y/x+y的值.
已知x²+y²-6x+4y+13=0,求(2x-y)²-2(2x-y)(x+2y)+(x+
已知x²+y²+13-4x+6y=0,求(2x-y)²-2(2x-y)(x+2y)+(x+
x平方+y平方-4x-6y+13=0 ,求3x+4y
已知:x^2+y^2+4x-6y+13=0,求x^y值.
已知实数x、y满足x²+y²+4x-6y+13=0