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Iontulvure78
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(2-√3)³ =?

Răspuns :

[tex](2- \sqrt{3} )^3=2^3- \sqrt{3} ^3-3 \times 2 \times \sqrt{3} (2- \sqrt{3} )= \\ =8-3 \sqrt{3} -6 \sqrt{3} (2- \sqrt{3} )=8-3 \sqrt{3} -12 \sqrt{3} +18=26-15 \sqrt{3} [/tex]

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