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a fost răspuns

(7-\sqrt{3} )[tex](7- \sqrt{3} ) [/tex]²

Răspuns :

7²-2x7x√3+3
49-2x7x√3+3
52-2x7x√3
52-14x√3=27,75
[tex](7- \sqrt{3} )^2= \\ =7^2-2*7* \sqrt{3} + \sqrt{3} ^2= \\ =49-14 \sqrt{3} + \sqrt{9}= \\ =49-14 \sqrt{3} +3= \\ =-14 \sqrt{3} +52[/tex]

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