X=(√3-√2)÷(√3﹢√2),Y=(√3+√2)÷(√3-√2),求3X²-5XY+3Y²的值
√x(√x+2√y)=√y(6√x+5√y,求x-3√xy+2y/x+√xy-6y
设√x(√x-√y)=√xy+3y,求2x+3√xy-y/3x-y的值.
若x>0,y>0,且√x(√x+√y)=3√y(√x+5√y),求(2x+2√xy+3y)/(x-√xy+y)的值.
当x>0,y>0且√x(√x+√y)=3√y(√x+5√y),求2x+(√xy)+3y/x+(√xy)-y的值
已知2X-3√xy-2y=0(x>0)求2x²+xy-9y²分之x²+4xy-16y
已知|x²-2xy-8y²|+2√x²-4xy+4y²-1=0,求3x+6y的值
已知x+y=3 xy=-2 求代数式 (3xy+10y)+[5x-(2xy+2y-3x)]的值
已知x>0,y>0,且x-2√xy-15y=0,求(2x+√xy+3y)÷(x+√xy-y)的值
如果x²+y²-4x-2y+5=0,求代数式﹙√x-√y﹚²+4√xy/x+√xy的值
已知:(x-y)²与√5x-3y-6互为相反数,求:√x²+2xy+y²的值
已知实数x,y满足x^2+√2y=√3,y^2+√2x=√3,求x+y和xy的值
x+y=3Xy,求X+y+2Xy分之2X+2y-Xy的值是多少?