若(x-3)2=169,(y-1)3=-0.125,求x−2xy−316y−x
若(x-3)2=169,(y-1)3=-0.125,求x−2xy−316y−x
x(x-1)-(x平方-y)=-3,求x平方+y平方-2xy
将x(x+y)(x-y)-x(x+y)2进行因式分解,并求当x+y=1,xy=−12
1/x-1/y=2 求(2x+3xy-2y)/(x-xy-y)的值
1/x-1/y=4,求分式(3x+xy-3y)/(x-2xy-y)
若x-y=4,xy=1,求(-2xy+2x+3y)-(3xy+2y-2x)-(x+4y+xy)的值
已知(x+2)^2+|x+y+5|=0,求3x^2y-[2x^2y-(2xy-x^2y)-4x^2]-xy
2x²-3xy=y²=0(x,y不得o)求x/y+y/x
初中数学分式已知x/y=2,求(x*x-xy+3y*y)/x*x+xy+6y*y的值
1,若x+y+3=0,求3分之2-2x-2y+(-x-y)的平方 2,已知xy分之x+y=3,求-x+2xy-y分之2x
已知y=3xy+x,求代数式2x+3xy−2yx−2xy−y
已知xy=2,x-y=3,求(x+y)(x-y)-y^2-(6x^2y-2xy^2)/2y的值.