Posted by john on Tuesday, September 13, 2011 at 10:52am.
Perform the indicated operation(s) and express the result in standard form. Leave answers in terms of square roots (do not use decimals).
(9sqrt3)^2

math  Henry, Wednesday, September 14, 2011 at 9:10pm
(9  sqrt(3))^2 =
(9  sqrt(3*1)^2=
(9  isqrt(3))^2 =
81 + 18isqrt3 + 3 =
3(27 + 6isqrt3 + 1).