Question 750643
We'll use this form:


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


{{{
6^2=(4-0)^2+(-3-y[1])^2
}}}




{{{
(-3-y[1])^2=36-16
}}}



{{{
y[1]=sqrt(10)-3
}}}

or 


{{{
y[1]=-sqrt(10)-3
}}}




:)