Răspuns :

Matepentrutotiid

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Vezi imaginea Matepentrutoti

Răspuns:

x^2 + y^2=29

x+y=3

<=>

x^2 + y^2=29

x=y-3

<=>

(y-3)^2 +y^2= 29<=> y^2 -6y+9+y^2=29<=> 2y^2 -6y-20=0<=> delta=36-4*2*(-20)=36+160=196

y1=(6+14)/4=20/4=5

y2=(6-14)/4=-8/4=-2

x=y-3=5-3=2

sau

x=y-3=-2-3=-5

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