### Algebra 2 PARCC: imaginary number arithmetic

Doing arithmetic with imaginary numbers involving *i*, the square root of –1, is an algebra 2 skill and might be tested on PARCC.

Doing arithmetic with imaginary numbers involving *i*, the square root of –1, is an algebra 2 skill and might be tested on PARCC.

We sometimes need to develop mathematical models for costs we incur in our jobs or in daily life. Here’s one way to do just that.