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a fost răspuns

Efectuati calculele: a)8√2+4(√5-2√2)-3√5; b15√3-3(√7+5√3)-2√7; c)√3(√2-2√5)+√60-√24; d)√7(√3-2√8)+5√56-√84.

Răspuns :

a)8√2+4(√5-2√2)-3√5=8√2+4√5-8√2-3√5=√5
b15√3-3(√7+5√3)-2√7=15√3-3√7-15√3-2√7=-5√7
c)√3(√2-2√5)+√60-√24=√6-2√15+2√15-2√6=-√6
d)√7(√3-2√8)+5√56-√84=√21-2√56+5√56-√84=
√21-8√14+10√14-2√21=2√14-√21