`p=(x-y+3sqrt{x} +3sqrt{y})/(sqrt{x}-sqrt{y}+3)``=[(sqrt{x}-sqrt{y})(sqrt{x}+sqrt{y})+3(sqrt{x}+sqrt{y})]/(sqrt{x}-sqrt{y}+3)``=((sqrt{x}+sqrt{y})(sqrt{x}-sqrt{y}+3)]/(sqrt{x}-sqrt{y}+3)``=sqrt{x}+sqrt{y}` Reply
`p=(x-y+3sqrt{x} +3sqrt{y})/(sqrt{x}-sqrt{y}+3)`
`=[(sqrt{x}-sqrt{y})(sqrt{x}+sqrt{y})+3(sqrt{x}+sqrt{y})]/(sqrt{x}-sqrt{y}+3)`
`=((sqrt{x}+sqrt{y})(sqrt{x}-sqrt{y}+3)]/(sqrt{x}-sqrt{y}+3)`
`=sqrt{x}+sqrt{y}`
Đáp án:
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