Question

Ex 5 de la testul 2 . Va rog.. dau coroana

Answer 1

2.6<2a<4.8    7.5<3b<10.8
18.46<2a+3b+5.06<20.66
3.453<a x b -0.203<8.843
1.69+6.25<a^2+b^2<5.76+12.96
7.94<a^2+b^2<18.72
7.8<6a<14.4
5<2b<7.2
1.69<a^2<5.76
4.4<6a-2b+a^2<12.96

Answer 2

ex2 )
x + 21,7 = 42,3
x = 42,3 - 21,7
x = 20,6

b)
x - 3,56 = 9,7
x = 9,7 + 3,56
x = 13,26

c)
x : 2,7 = 7,23
x = 7,23 * 2,7
x = 19,521