Rút gọn căn thức: 3* $\sqrt[]{\frac{129}{16}+\sqrt[]{2} }$
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`#tnvt`
`3.\sqrt{129/16+\sqrt{2}}`
`=3.\sqrt{\frac{129+16\sqrt{2}}{16}}`
`=3.\sqrt{\frac{128+2.8\sqrt{2}.1+1}{4^2}}`
`=3.\sqrt{\frac{(8\sqrt{2}+1)^2}{4^2}}`
`=3.|\frac{8\sqrt{2}+1}{4}|`
`=3. \frac{8\sqrt{2}+1}{4}`
`=\frac{24\sqrt{2}+3}{4}`
`y10000`
`•3.\sqrt{\frac{129}{16}+\sqrt{2}}`
`=3.\sqrt{\frac{129+16\sqrt{2}}{16}}`
`=3.\sqrt{\frac{(8\sqrt{2})²+2.8\sqrt{2}.1+1²}{16}}`
`=3.\sqrt{\frac{(8\sqrt{2}+1)²}{16}}`
`=3.|\frac{8\sqrt{2}+1}{4}|`
`=\frac{24\sqrt{2}+3}{4}`
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