Question

2x^2-8=0 rozwiąż równanie

Answer 1

2x² - 8 = 0       /:2

x² - 4 = 0

(x - 2)(x + 2) = 0

 

x - 2 = 0     v     x + 2 = 0

x = 2    v     x = -2

Z = {-2,2}