Question

Calculati media aritmetica a solutiilor ecuatiei x^2+5x+6=0

Answer 1

Δ=$5^{2}-4*1*6=1$
$x_{1}= \frac{-5+ \sqrt{1} }{2} =-2$
$x_{2}= \frac{-5- \sqrt{1} }{2} = -3$
Media aritmetica ceruta este $\frac{-2-3}{2}=- \frac{5}{2}$