Răspunsuri

2014-08-06T14:54:17+03:00
1.Determinati numerele a si b.
a²+b²=73
 a*b=24
a²+b²+2a*b=73+2*24
(a+b)²=121
a+b=11
a*b=24=8*3
8²+3³=64+9=73
a si b sunt 3 si 8

2.Sa se determine numerele reale x si y.
x²+y²+12x-6y+45=0

x²+y²+12x-6y+45=(x+6)²+(y-3)²=0
x+6=0=> x=-6
y-3=0 => y=3