Homework Statement

Hello everyone!

How would you solve a quadratic or nth degree congruence? For example how would I solve:

(x^2) + 2x -3 = 0 (mod 8 )

The Attempt at a Solution

I know this can be written like:

(x^2) + 2x = 3 (mod 8 ) but where would I go from here? and would I use the same approach for nth degree congruencies?

Thanks

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