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Efectuati caluclele
[(√7-√3)^2+√84]x(√20)^-1
√6(9:√3+8:√2)-√24x(5:√2+7:√3)


Răspuns :

[(√7-√3)^2+√84]x(√20)^-1 =

= (7 - 2√21 + 3 + 2√21)×1/2√5

= 10/2√5

= 5/√5

= 5√5/5

= √5

√6(9/√3 + 8/√2)-√24(5/√2 + 7/√3) =

= √6(9√2 + 8√3) - 2√6(5√3 + 7√2)

= 9√12 + 8√18 - 10√18 - 14√12

= -5√12 - 2√18

= -10√3 - 6√2