Is it possible to get the square root of a number like 8 or possibly 23

Consider symmetrically placed rectangular insulators with uniformly charged distributions of equal magnitude as shown. x y −−−−−− what is the direction of the net field at the origin?

What is the name used to describe a graph where for some value of x, there exists 2 or more different values of y?

What is the solution to the division problem below x3+x2-11x+4/x+4