已知y=√(x-3 )+ √(3-x )+5则x^-xy+y^=?
已知1/x=1/y+3,则(5x+xy-5y)/(x-xy-y)的值为( )
已知y=√(x-3 )+ √(3-x )+5则x^-xy+y^=?
已知(x+2)^2+|x+y+5|=0,求3x^2y-[2x^2y-(2xy-x^2y)-4x^2]-xy
已知非零实数x、y满足x-5(√xy)-6y=0,则x/y
已知xy/x+y=1/2,则代数式3x-5xy+3y/-x+3xy-y=
已知y=根号下(x-4)+根号下(4-x)+3,求代数式(x-y+4xy/x-y)(x+y-4xy/x+y)?
已知x-y=3,xy=5则代数式(3x-4y+5xy)-(2x-3y)+5xy的值是
已知x-y=3,xy=5,则代数式(3x-4y+5xy)-(2x-3y)+5xy的值是?
已知x+y=5,xy=-1,则(3x-4y+2xy)-(2x-5y+5xy)=?
已知xy/x+y=2,则代数式3x-5y+8y/-x+3xy-y的值
已知x-y=3xy,且xy不等于0,则-3x+6xy+3y/(7x-5y)-9xy-(3x-y)
已知x>0,y>0,x-5√xy -6y=0,求代数式(4x+√xy +3y)÷(9x+5√xy +6y)的值