Верно ли равенство (распишите подробно):
а). [tex] \sqrt{14-6 \sqrt{5} } = \sqrt{5}-3 [/tex]
б). [tex] \sqrt{7-4 \sqrt{3} }= \sqrt{3}-2 [/tex]
в). [tex] \sqrt{15-6 \sqrt{6} }=3- \sqrt{6} [/tex]
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