Question

Este urgent!
Dau coroana ​

Answer 1

Răspuns:

Explicație pas cu pas:

a) 4·√0,25+5/2·√0,36+√196·2,5= 4·√(25/100)+5/2·√(36/100)+√14²·25/10=

4·(5/10)+(5/2)·(6/10)+14·25/10= 4/2+(5·6)/(2·10)+(14·5)/2=2+3/2+35 =37+3/2 =(74+3)/2=77/2

b) 0,1(6)·√1296-0(5)·√0,81+11/18·√(81/121)=

15/90·√(36²)-5/9·√(81/100)+11/18·√(9²/11²)= (15/90)·36-5/9·9/10+11/18·9/11=  

15·36/90-(5·9)/(9·10)+(11·9)/(18·11)= ( 15·4)/10-1/2+1/2=60/10=6

c) √(144/25):√1,44+1,(2)·√(4/25)-√729/9= 12/5:1,2+11/9·2/5-27/9= 12/5:12/10+(11·2)/(9·5)-3= 12/5·10/12+22/45-3=2+22/45-3=22/45-1=(22-45)/45=-23/45

d) 3/10·√12,96-5 1/3:√2,56+1,2·√25= 3/10·3,6-16/3:1,6+1,2·5=

3/10·36/10-16/3·10/16+12/10·5= (3·36)/(10·10)-10/3+12·5/10=

108/100-10/3+6=27/25-10/3+6= (27·3-10·25+6·75)/75 =

(81-250+450)/75=281/75