Question 97462
2rh+2r^2=A; solve for h
subtract 2r^2 from each side. 2rh=A-2r^2
divide 2r into each side. {{{h=(A-2r^2)/2r}}}
.
you did well.
Your only mistake was your last step.
if you divide 2r into you have to divide into both A and -2r^2 and you get {{{(A/2r)-2r}}} which is equivalent to my answer.
Ed