Question

primele 4 exercitii va rog

Answer 1

1. √18-√2-√2=3√2-2√2=√2.

2. Apatrat=20²=400cm².

3. 2√3 si 3√2 ║² ⇒ 12<18 ⇒ 2√3<3√2.

4. Ma=1/2(25+49)=37, Mg=√(25·49)=5·7=35.