A non-linear equation is any equation which includes variables with a degree other than one. Therefore, any equation involving x2, x3, x4, .... would be non-linear.For example: y= 3x+2 is linear,...
y=3x+2
y-4x=9
These are examples of linear equations which is a first degree algebraic expression with one, two or more variables equated to a constant.
So x=2 is a linear equation as is y=1 but x2...