Well I hate to break the news but 243 is not a perfect square. I'll work you through it, 243 is not a perfect square because it is not an even number. an even number must end in (0,2,4,6,8)
Step one. Find the square root. the square root of 243 is <em>15.588. </em>
Step two Is it a perfect square. No 243 just cant be a perfect square.
