Question

A number written in the form a + bi is called a _____ number.

A. complex
B. linear
C. quadratic
D. discriminant

Answer 1

the answer is complex number

a complex number is 2 parts
1. the real part
2. the imaginary part

the real part is the 'a' part of the a+bi
the imaginary part is the 'bi' part of the a+bi

answer is A
(B means exponent is no higher than 1, C means exponent is 2, D means b^2-4ac)

answer is A