Dividing by variable when solving algebraic equation

[Fireball]

Could I have an example?

Any equation where the constant is positive will do.

E.g. x^2 + 4

Let's test where it intersects the x axis:

x^2 + 4 = 0

=> x^2 = -4

therefore, x = 2i

Thanks! Next time, I'll pour more coffee down the inside of my neck before I ask a question. I taught algebra for a couple of years. My brain obviously had checked out for parts unknown while reading this thread.