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CALCULATI:
a) 2(4+√21)-6√7+2√7·93-√3)
b) 4√3(√8-√3)-2√2·(3√3-√2)


Răspuns :

a)8+2√21-6√7+6√7-2√21=8

b)4
√3(2√2-√3)-2√2·(3√3-√2)=
   8
√6-12-6√6+4=
   2√6-8=
   2(√6-4)