Verified answer

x²=11

x = ±√11

x = {+√11, -√11}

Well, if a number is squared that number is multiplied by itself (2•2, or 4•4) so then x•x is x² and the square root of 11 is not all that pretty of a number as 5.5 and since this is a function it'll only have one answer. So now do you know the answer?

C

x can be more than 1 number

x = square root of 11

x = 3.3166247904... AND x = -3.3166247904...

A

C.