Question

ma puteti ajuta la urmatorul exercitiu E(a,b)=a(LA PATRAT)+9b(la patrat)-4a+6b+5
a,si,b=? stiind ca E(a,b)=0

Answer 1

E(a,b)=(a²-4a+4)+(9b²+6b+1)=0
E(a,b)=(a-2)²+(3b+1)²=0
a-2=0=>a=2
3a+1=0=>b=-1/3