va rog repede vreau sa ma verific ca am facut corect aceasta problema

Răspuns:
0.035 ha=350 m²
350=a²+(2a)²+(4a)²
350=a²+4a²+16a²
350=21a² /:21
50/3=a²
deci, a1=[tex]\sqrt{} \frac{50}{3}[/tex]=5√2/√3=2√15/3,
iar a2= -2√15/3