Exercitiul 1
[tex] \sqrt{3}(2 - \sqrt{2} ) + \sqrt{2} ( \sqrt{3} - \sqrt{6} ) = 0 \: = > adevarat[/tex]
[tex]2 \sqrt{3} - \sqrt{6} + \sqrt{6} - \sqrt{12} [/tex]
[tex]2 \sqrt{3} - 2 \sqrt{3} [/tex]
[tex]0[/tex]
Exercitiul 3
2^7x-5=4^x
2^7x-5=2^2x
7x-5=2x
7x-2x=5
5x=5
1
Exercitiul 6
sin30°+sin45°-cos60°-cos45°=0 => adevarat
1/2+√2/2-1/2-√2/2
0+0
0
