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a fost răspuns

Rezolvati in R ecuatia :
4x²+4x+1=0
5x²-7x+2=0
3x²-2x+1=0

Răspuns :

Mikkka
(2x+1)² = 0 ⇒ 2x+1=0⇒ 2x= - 1⇒ x= -1/2

5x²-5x-2x+2=0 ⇒ 5x(x-1) - 2(x-1)=0⇒ (x-1) (5x-2)=0
⇒ x-1=0⇒ x=1 sau 5x-2=0⇒⇒ 5x=2⇒ x=2/5 ⇒ x∈{1; 2/5}

3x²-2x+1=0 nu are solutii in R

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