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Efectuati(2-√3)totul la puterea a 2



Răspuns :

[tex]Se \ foloseste \ formula \ de calcul \ prscurtat \\ (a-b)^{2}=a ^{2}-2ab+b ^{2} \\ \\ (2- \sqrt{3}) ^{2}=2 ^{2}-2*2* \sqrt{3}+( \sqrt{3} )^{2} \\ (2- \sqrt{3} ) ^{2}=4-4 \sqrt{3}+3 \\ (2- \sqrt{3})^{2} = \boxed{7-4 \sqrt{3}} [/tex]
(2-√3)²=2²-4√3`+√3²
=4-4√3+3
=7-4√3