Question

x^2+9x+14=0 решите уравнение

Answer 1

x² + 9 x + 14 = 0
D = 81 - 4 * 14 = 81 - 56 = 25 = 5²
x(1) = (-9+5)/2 = -4/2 = -2
x(2) = (-9-5)/2 = -14/2 = -7