Question

Rezolvati in R ecuatiile de gradul II ,forma incompleta

a)3x²-5x+2=0
b)x²+3x+5=0
c)25x²+10x+1=0

Answer 1

a) 3x²-5x+2=0
(x-1)(3x-2)=0 => x=1; x=2/3

b) x²+3x+5=0  Δ=9-20 =>  Δ=-11. nu exista solutii in R

c) 25x²+10x+1=0
(5x+1)^2=0 => 5x+1=0 => x=-1/5