Meaning of imaginary number | Babel Free

Definitions

1. A number of the form bi, where b is any real number and i denotes the imaginary unit.
   strict-sense
2. A number of the form a + bi, where a and b are real numbers and b is nonzero.
   broadly

Equivalents

Examples

“If a#61;0, then x#61;ib is called an imaginary number. The message here is that we must introduce imaginary numbers in order to be able to solve quadratic equations in general.”

CEFR level