Is the equation 2x^2 + 5x - 3 = 0 linear or nonlinear?

Answer 1

The equation $2x^2+5x-3=0$ is nonlinear. This is because it contains a term with $x^2$ (the quadratic term), which makes it a quadratic equation. Linear equations have the highest degree of 1, whereas this equation has a degree of 2 due to the $x^2$ term.