Question

9.Calculatii: b)$\sqrt 169 supra 81 c) \sqrt 1 intreg 7 supra 9 d) \sqrt 0,0225 e) \sqrt 4,84 f) \sqrt 3,36.$

Answer 1

√169/81=√169/√81=13/9

√1 7/9 =√ (9+7)/9=√16/9=√16/√9=4/3

√0,0225=√225/1000=√225/√10000=15/100=3/50

√4,84 = √484/100=√(2²11²)/100=2*11/10=22/10=2,2

√3,36 =√336/100=√(2²x2²x3x7)/√100=(4√21)/10=0,4√21