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Ex 3 va rog H.E.L.P !! EXPLICIT SI URGENT

Ex 3 Va Rog HELP EXPLICIT SI URGENT class=

Răspuns :

[tex]a) \sqrt{27} + \sqrt{12} = 3 \sqrt{3} + 2 \sqrt{3} = (3 + 2) \sqrt{3} = 5 \sqrt{3} [/tex]

[tex]b) \sqrt{8} - \sqrt{18} = 2 \sqrt{2} - 3 \sqrt{2} = (2 - 3) \sqrt{2} = - 1 \sqrt{2} = - \sqrt{2} [/tex]

[tex]c) \sqrt{32} - \sqrt{72} = 4 \sqrt{2} - 6 \sqrt{2} = (4 - 6) \sqrt{2} = - 2 \sqrt{2} [/tex]

[tex]d) \sqrt{45} - \sqrt{20} = 3 \sqrt{5} - 2 \sqrt{5} = (3 - 2) \sqrt{5} = 1 \sqrt{5} = \sqrt{5} [/tex]