Algebra 2 Math tutorial for how to simplify the quotient by dividing complex numbers using conjugate

The video tutorial addresses common mistakes students make when multiplying expressions involving the imaginary unit I. It explains why multiplying by the conjugate is beneficial, as it eliminates middle terms in binomial multiplication. The tutorial demonstrates the FOIL method to simplify expressions and concludes by expressing the result in the standard form of complex numbers, A+BI.

How do you combine the terms in the expression 12 + 7I - 1?

What is the final form of a complex number, and how is it represented?