Question 103677
Let's say you had the point ({{{x[1]}}},{{{y[1]}}}). So the distance between (0,0) and ({{{x[1]}}},{{{y[1]}}}) is 


{{{d=sqrt((x[1]-0)^2+(y[1]-0)^2)}}}


{{{d=sqrt((x[1])^2+(y[1])^2)}}}



So let's say we had the point (2,3) and we wanted to know the distance from (0,0) to (2,3)


{{{d=sqrt((x[1])^2+(y[1])^2)}}} Start with the previously solved formula



{{{d=sqrt(2^2+3^2)}}} Plug in {{{x[1]=2}}} and {{{y[1]=3}}}



{{{d=sqrt(4+9)}}} Square each term



{{{d=sqrt(13)}}} Add



So the distance from (0,0) to (2,3) is {{{d=sqrt(13)}}}