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-2[tex]x^{2}[/tex]-5x+3=0
3[tex]x^{2}[/tex]-5x+2=0
9[tex]x^{2}[/tex]-3x+2=0
[tex]x^{2}[/tex]+x+1=0
-[tex]x^{2}[/tex]+16=0
-[tex]x^{2}[/tex]+2x=0
Ecuatia de gradul 2.


Răspuns :

Răspuns:

Explicație pas cu pas:

16-x²=0...(4-x) (4+x) =0...x1,2=±4

2x-x²=0....x(2-x) =0...x1=0; x2=2

3x²-5x+2=0

x1,2=(5±√(25-24))/6= (5±1)/6...x1=4/6=2/3; x2=1

x²+x+1=0...x1.2∉R pt gimnaziu

x1,.2= (-1±i√3)/2 pt liceu