Răspunsuri

2014-01-26T14:26:37+02:00
( a+b )^{2}  =  a^{2} +  b^{2}  + 2ab =>
=>  4^{2}  =  a^{2} + b^{2} + 2·3 => 16 =  a^{2} +  b^{2} + 6 =>
=>  a^{2} + b^{2} = 10
11 4 11
2014-01-26T14:28:25+02:00
A+b=4
a*b=3
a=4-b
(4-b)*b=3
4b-b*b=3(inmultesti cu -1)
b*b-4b+3=0
delta=16-12=4=2*2
b1=(4-2)/2=1
b2=(4+2)/2=3
a1=4-1=3
a2=4-3=1
a patrat + b patrat = 9+1 sau 1+9 =10
7 2 7