MichalPokorny/khan-exercises — comment on commit e737116e9bcc196f9ccaad64b11ce1cbd011018a
File: exercises/multiplying_complex_numbers.html line 30
By Christi:

"Complex numbers are multiplied the same way two binomials are multiplied" ? I would avoid "any polynomials" because it's closer to two binomials than say two trinomials.