y=(3+2x-x^2)^(-1/2)y'=(-1/2)[(3+2x-x^2)^(-3/2)]*(3+2x-x^2)'=(-1/2)[(3+2x-x^2)^(-3/2)]*(2-2x)=(x-1)(3+2x-x^2)^(-3/2)
