Question

Cele 3 exercitii vă rog repede!!!!

Answer 1

1. S1: x1+x2+x3= -b/a=a/3
S2: x1x2+x1x3+x2x3=c/a=5/3
S3: x1•x2•x3= -d/a=4/3

X1+x2+x3+x1•x2•x3=2
a/3+4/3=2
(a+4)/3=2
a+4=2•3
a+4=6
a=2

2. S1: x1x2+x1x3+x2x3=c/a=0
S2: x1•x2•x3= -d/a= -14

x1 x2 x3 -(x1x2+x1x3+x2x3)
= -14-0
= -14

3. S= x1^2+x2^2+x3^2= S1^2+2S2

S1: x1+x2+x3+x4+x5= -b/a=0
S2: x1x2+x1x3+x1x4+x1x5+x2x3+x2x4+x2x5+x3x4
+x3x5+x4x5= c/a = 0

S=0


Sper sa intelegi ce am scris iar unde ai ,,/" e bara de la fractie. Daca ti se pare bun voteaza ,, cel mai bun raspuns"