There's this question that baffles me.

Determine whether 2x³ - 3x² + 1 has a repeated factor. If so, find the repeated factor.

I used P(1) and found out that 2x³ - 3x² + 1 = 0 when I substitute the 1 into x. Hence, I know that x - 1 is a factor of 2x³ - 3x² + 1. But how do I know whether x - 1 is a repeated factor or not?