I have an equation of type: y = a1*x^b + a2 * x + e1 where e1 is error in the y experimental data corresponding to x. What type of least square method i should apply to get the values of e1, a1 and a2. What will be the normal equations of least square i should use for getting the reqquired values or what technique i use to get the value of e1 and a1 if i have y, x and a2 known.