Valoarea minima= [tex]y _{min} =5[/tex]
[tex] y_{min} = \frac{- \alpha }{4a} [/tex] ( [tex] \alpha [/tex] = delta- Δ)
Δ=[tex] b^{2} -4ac[/tex]
Δ=[tex]m^{2} - 8[/tex]
[tex]=>\frac{-m ^{2}+8 }{4} =5 => - x^{2} +8 =20 [/tex]
[tex]=> -m^{2} =12 => m= \sqrt{12}=2 \sqrt{3} [/tex]
Eu am luat cazul in care x nu are minus in fata.
