Răspuns :
pt. x=-3 avem 2(-3)²-1= ... 18-1 =17 (A)
pt. x=2 ,, 2*2² - 1 = ... 8 - 1 ≠17
pt. x=3 ,, 2*3²-1 = ... 18 -1 = 17 (A)
pt. x=2 ,, 2*2² - 1 = ... 8 - 1 ≠17
pt. x=3 ,, 2*3²-1 = ... 18 -1 = 17 (A)