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demonstrati ca |1-[tex] |1- \sqrt{3} |- \sqrt{7 +4 \sqrt{3} } =
\s
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Răspuns :

7+4√3=4+2*2*√3+3=(2+√3)²..|1-√3|=√3-1 =>. √3-1-(2+√3)=√3-1-2-√3=-3