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v = radical
1. a) 5v3+3×{4v2+4 [3v3+2 (v3-3v2]}÷20


Răspuns :

a)5√3+3×[4√2+4×(3√3+2√3-6√2)]÷20=
5√3+3×(4√2+4×5√3-24√2)÷20 =5√3+3×(20√3-20√2)÷20
=5√3+3×(√3-√2)
=5√3+3√3-3√2
=8√3-3√2
SUCCES!!