# Factorizing a polynomial

1. Feb 10, 2009

### Niles

1. The problem statement, all variables and given/known data
Hi all.

I have to solve $0=-x^4+x^2+\alpha$, where alpha is a constant. I thought of factorizing it, but this wont work.You guys have any tip for solving this?

Sincerely,
Niles.

2. Feb 10, 2009

### Dick

If you substitute u=x^2, it turns into a quadratic equation.

3. Feb 10, 2009

### Niles

Ahh, so simple. I hadn't thought of that.

Thanks.