Răspunsuri

2014-06-21T14:48:57+03:00
A²-4a+4+b²+6b+9=0

(a-2)²+(b+3)²=0

a-2=0  ∧b+3=0
a=2      ∧b=-3

a+b=2-3=-1
1 5 1
2014-06-21T15:05:20+03:00
A^2-4a+4+b^2+6b+9
(a-2)^2+(b+3)^2=0
a-2=0
a=2
b+3=0
b=-3
a+b= 2+(-3)
a+b=2-3
a+b=-1
2014-06-21T15:05:24+03:00
A^2-4a+4+b^2+6b+9
(a-2)^2+(b+3)^2=0
a-2=0
a=2
b+3=0
b=-3
a+b= 2+(-3)
a+b=2-3
a+b=-1