f(x)=x^+2x+8найти произв

х^2 + 2х + 8 D = 2^2 + 4 · 1 · 8D = 4 + 32D = 36x1 = (- 2 + 6)/2 = 4/2 = 2x2 = (- 2 - 6)/2 = -8/2 = -4