👤

Vă rog!
Dau coroana!
Repede!!!


Vă Rog Dau Coroana Repede class=

Răspuns :

5•3=x(x+2)
x^2 + 2x - 15 = 0
delta = 2^2 - 4•1•(-15)
delta = 4+60 = 64 =>rad.delta=8
x1=(-2-8)/2=(-5)
x2=(-2+8)/2=3
sol. (-5, 3)

[tex]\frac{x}{3}=\frac{5}{x+2}[/tex]

[tex]x(x+2)=15[/tex]

[tex]x^{2}+2x-15=0[/tex]

Δ = 4-4·1·(-15) = 64

[tex]x_{1}=\frac{-2+8}{2}=3[/tex]

[tex]x_{2}=\frac{-2-8}{2}=-5[/tex]