Discreet mathematics 1

Question

x² + 4 = 3 ( mod 5 ).

Answer 1

2023311110, hello 

First, 3 mod 5 is just 3

So what we have is: x² + 4 = 3 which gives us: x² = -1

Therefore: \(x = { \sqrt{-1}}\) or x = i

Please let me know if this helps