Question

rezolvați ecuația x²+5x+6=0​

Answer 1

x²+5x+6=0​

$\Delta = 5^2-4*1*6 = 25-24=1\\x_{1;2}=\frac{-5\pm\sqrt{\Delta}}{2}\\x_{1}=\frac{-5+1}{2}=\frac{-4}{2}=-2\\x_{2}=\frac{-5-1}{2}=\frac{-6}{2}=-3$