Răspuns :
a²+b²-2a+6b+10=0,
(a²- 2a + 1)+( b²+ 6 b+ 9)=0, a- 1= 0 | + 1,=> a=1, b+ 3 = 0 | - 3=> b= - 3
a²-2a+1 + b²+6b+9 = 0
(a-1)² + (b+3)² = 0
⇒ a-1=0 deci a=1
si b+3=0 deci b=-3
(a-1)² + (b+3)² = 0
⇒ a-1=0 deci a=1
si b+3=0 deci b=-3