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Rezolvati in R ecuatia a)5x²+0,5x=0 b) 3x²+13x-10=0 c) 5x(5x+2)+3=0

Răspuns :

a) 5x²+0,5x=0
x(5x+0,5)=0
x1=0
x2=-0,1
b) 3x²+13x-10=0
Δ=13²-4*3*(-10)=169+120=289=17²
x1=(-13-17)/6=-5
x2=(-13+17)/6=2/3
c) 5x(5x+2)+3=0
25x
²+10x+3=0
Δ=100-4*25*3=100-300=-200
nu are solutii reale