2 câu trả lời
$\text{∛20-14√2+∛20+14√2}$
$\text{=∛(2-√2)³+∛(2+√2)³}$
$\text{=2-√2+2+√2}$
$\text{=4}$
Câu hỏi trong lớp
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$\text{∛20-14√2+∛20+14√2}$
$\text{=∛(2-√2)³+∛(2+√2)³}$
$\text{=2-√2+2+√2}$
$\text{=4}$