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c) 5√3+2√3-6√3 este?

Răspuns :

5√3+2√3-6√3 = (5+2-6)√3  = (7-6)√3 = 1√3 = √3
5 radical 3 + 2 radical 3 = 7 radical 3
7 radical 3 - 6 radical 3 = 1 radical 3