Question

Rezolvare pas cu pas!

Answer 1

Răspuns:

Explicație pas cu pas:

a)

$\displaystyle -\frac{\Delta}{4a}=-2\Rightarrow m^2-m-2=0\Rightarrow m\in\{-1,2\}$

b)

$\Delta < 0\Rightarrow 4m^2-4m < 0\Rightarrow m\in(0,1)$

c)

$S=x_1+x_2=-2m\\P=x_1x_2=m$

Expresia se scrie

$\displaystyle\frac{S^2-2P}{S}+2P=\frac{4m^2-2m}{-2m}+2m=-2m+1+2m=1$