(x+2√xy+y)÷(√x+√y)
=(√x+√y)²÷(√x+√y)
=√x+√y还有几道可以问你吗/?????根号5x＞3根号5x-4根号3√5x>3√5x-4√3√5x-3√5x>-4√3-2√5x>-4√3x<√15/6