A linear equation is a strictly first degree equation. That is, the term with the highest degree must be of degree 1. To determine the degree of any term, ADD all of the exponents in that term. If a variable does not have an exponent, the the exponent is assumed to be 1. Consider your term. is equivalent to , add 1 for the exponent on plus 1 for the exponent on and you have 2. is therefore a 2nd degree term and the equation is non-linear by definition.
John
Egw to Beta kai to Sigma
My calculator said it, I believe it, that settles it
