Question

1.Znajdź x : 2, x^2 +3 , x+ 10. prosze o rozwiazania zadania .:)

Answer 1

2 ,   x² + 3,   x + 10

a1      a2          a3

 

a2 - a1 = a3 - a2

x² + 3 - 2 = x + 10 - x² - 3

x² + 1 = -x² + x + 7

x² + x² - x - 7 + 1 = 0

2x² - x - 6 = 0

Δ = 1 + 24 = 25

√Δ = 5

x1 = (1 - 5) / 4 = -4/4 = -1

x2 = (1 + 5) / 4 = 5/4