Quadratic Congruence with Composite Modulus 93

This video discusses how to solve a system of quadratic congruences for the variable x. but when the modulus is not a prime number. So, the modulus is compound number so take the prime factorization and split the equation into a combination of each of the solutions for each of the prime factors. There is normally 2 per mod prime factor but this is not always the case.
We use the Chinese remainder theorem to solve each combination of the congruences.
This is a topic in Number Theory
The question is 7x^2+15x=-8 for mod 93.
93 = 31*3 in prime factorization

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