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Denisairinaru
a fost răspuns

a) Rezolvati in multimea numerelor reale ecuatia: [tex] x^{2} [/tex] - 4x +3=0

Răspuns :

Matepentrutoti
Metoda 1)
x²-4x+3=0
x²-3x-x+3=0
x(x-3)-(x-3)=0
(x-3)(x-1)=0
x1=3
x2=1
Metoda 2)
Δ=b²-4ac=16-12=4
x1/x2=(-b+/-√Δ)/2a
x1=(4+2)/2=6/2=3
x2=(4-2)/2=2/2=1