Does anyone know the specific equations for the three parameters in a least-squares quadratic regression? I'm looking for something like $\beta_1=,\beta_2=,\beta_3=$ for each of $y=\beta_1+\beta_2x+\beta_3x^2$. To be clear, the right side of each of these equations should be evaluateable, using the data, to find the parameter. I was able to find the equations for linear regression on line, but google hasn't turned anything up for this.
Thanks in advance