Răspuns :
a+b = 12 ] :ab ⇒⇒⇒ 12/24 = a/ab +b/ab = 1/b+ 1/a ⇒ 1/a/+ 1/b = 1/2
Relatiile lui Viete:
a+b=12 => S=12;
ab=24 => p=24
1/a²+1/b²= (a²+b²)/a²b²=((a+b)²-2ab)/a²b²=(S²-2p)/p²=(12²-48)/24²=(144-48)/576=96/576=1/6
a+b=12 => S=12;
ab=24 => p=24
1/a²+1/b²= (a²+b²)/a²b²=((a+b)²-2ab)/a²b²=(S²-2p)/p²=(12²-48)/24²=(144-48)/576=96/576=1/6