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222-9+11+12:2*14+14 = ? ( )

Toán Lớp 9: Tính $\sqrt[3]{9+4\sqrt[]{5}}$

Toán Lớp 9: Tính $\sqrt[3]{9+4\sqrt[]{5}}$

Comments ( 1 )

  1. $\sqrt[3]{9-4\sqrt{5}} = $$\sqrt[3]{(\sqrt{5})²-2.\sqrt{5} .2+2²}$
    $\text{=}$$\sqrt[3]{(\sqrt{5}-2)²}$
    $\text{=}$$\sqrt[3]{\dfrac{(\sqrt{5}-2)³}{\sqrt{5}-2}}$
    $\text{=}$$\frac{\sqrt{5}-2}{\sqrt[3]{\sqrt{5}-2}}$

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222-9+11+12:2*14+14 = ? ( )