How will you explain polynomials to a high school student?

Telephonic interview : intro and daily routine of my mother , that's it ! Then test : maths test and English test Then one on one round : subject matter questions were asked for eg what is fraction, ratio, prime number, multiples ,factors, you may prepare maths of middle school from 4-6 th class and also communication skills are also tested here Final round is pending : comm skills specifically.