Hi everyone!(adsbygoogle = window.adsbygoogle || []).push({});

1. Is a linear equation the same as a polynomial of first(or 0th) degree?

2. The book 'Mathematics for physicists and engineers' by springer(publisher) states that an example of a linear (DE) equation is 5.dy(x)/dx = x.y(x). Yet I read somewhere else that f(x,y)=a.x.y+b is not linear.(polynomial of 2nd degree).

Is one them wrong? Or are both right because in the first example y is a depent variable while in the second example y is an independant variable?

**Physics Forums | Science Articles, Homework Help, Discussion**

Dismiss Notice

Join Physics Forums Today!

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

# Confusion about linear equations

**Physics Forums | Science Articles, Homework Help, Discussion**