#y=x^2* l n (x)#
#u=x^2" ; " u'=2x#
#v=l n (x)" ; "v^'=1/x#
#y=u*v#
#(d y)/(d x)=u^'*v+v^'*u#
#(d y)/(d x)=2x* l n(x)+1/cancel(x)*cancel(x)^2#
#(d y)/(d x)=2x*l n(x)+x" 'The first derivative '"#
#a=2x" ; "a^'=2#
#b=l n(x)" ; "b^'=1/x#
#(d^2y)/(d x^2)=a^'*b+b^'*a+1#
#(d^2y)/(d x^2)=2*l n(x)+1/cancel(x)*2cancel(x)+1#
#(d^2y)/(d x^2)=2*l n(x)+2+1#
#(d^2y)/(d x^2)=2*l n(x)+3" 'The second derivative '"#