Question

DAU COROANA. FARA MISTOURI

Answer 1

Salut,

ex2. (2- radical 3)^2-(1- radical 27)^2+19=x radical 3-x

4-4 radical 3+3-1+6radical 3-27+19=x radical 3-x

2 radical 3-2=x radical 3-x

2(radical 3-1)=x(radical 3-1)

x=2

ex3. a=nr de cuburi

b=nr de tetraedre

8a+4b=44

2a+b=11


b=11-2a

6a+4b=38

3a+2b=19

3a+2(11-2a)=19

3a+22-4a=19

a=3(cuburi)

b=11-2×3=11-6=5(tetraedre)

$by \\ 7646$