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21. Calculaţi: a) 15-√√51+12-√√51-1√√20-31-16-2√51; c) 213√2-2√31+13√√8-8√31+ 2√12. b) 13√3-61+√√(√3-2)² √3-31-1
V rog urgent​


21 Calculaţi A 155112511203116251 C 2132231138831 212 B 1336132 3311 V Rog Urgent class=