2 câu trả lời
` a) ` ` \sqrt{17} - 3\sqrt{32} + \sqrt{17} + 3\sqrt{32} `
` = (\sqrt{17} + \sqrt{17}) - (3\sqrt{32} - 3\sqrt{32}) `
` = 2\sqrt{17} - 0 = 2\sqrt{17} `
@tandung154
a) `\sqrt{17}` - 3`\sqrt{32}` + `\sqrt{17}` + 3`\sqrt{32}`
= (`\sqrt{17}` + `\sqrt{17}`) - (3`\sqrt{32}` - 3`\sqrt{32}`)
= 2`\sqrt{17}` - 0
= 2`\sqrt{17}`
* Xin hay nhất