Implement a Haskell function to solve the quadratic equation ax^2 + bx + c = 0

quad a b c =

The function takes the three coefficients of the equation and produces a tuple containing

the two solutions of the equation. For example, to solve the equation x^2 + 4 x + 3 = 0 , apply the following call:

quad 1 4 3

(-1.0,-3.0)

You may use the Prelude function sqrt to find the square root of a number.