12-5·2= 12-10=2
b) 36
c) 39
2. 1/7
b) 2x = 7-3
2x = 4
x= 4:2 = a
c) 9-7=2
3. b) 130°
c) A = 35 cm ^2
4.a) 60°
b)9√3cm^2
c)6 √3 cm ^2
II. a) √324 = 18
b)(1/2) ^22-20+1 = (1/2)^3 = 1/8
c)6/6+8 = 6/14= 3/7
2. 1, (3) = 13- 1/9 = 12/9 = 4/3
0,75 = 75/100 = 3/4
4/3 · 3/4 = 1 => este numar natural
Nu mai timp, sper ca te-am ajutat pana aici!
