Question

Rezolvati ,va rog!!!!!!!!!!!

Answer 1

Răspuns:

Salut

1.x²-4x+3>0

x²-x-3x+3>0

x(x-1)-3(x-3)>0

(x-1)(x-3)>0

{x-1>0. <=>{x-1<0 <=>{x>1. <=>{x<1

{x-3>0 <=>{x-3<0 <=>{x>3<=>{x<3

x€(-oo;1)U(3,+oo)

2.{x-4=y

{x²-4x=y<=>

x-4=x²-4x

x=4

x=1

4-4=y

1-4=y

y=0

y=-3

(x1,x2)=(4;0)

(y1;y2)=(1,-3)

==evergreen==