Quadratic equation in Falcon

a = int(input())
if a == 0
    printl("Not a quadratic equation.")
    exit()
end
b = int(input())
c = int(input())
d = b ** 2 - 4 * a * c
if d == 0
    printl("x = " + (-b / 2.0 / a))
else 
    if d > 0 
        printl("x1 = " + ((-b + d**0.5) / 2.0 / a))
    	printl("x2 = " + ((-b - d**0.5) / 2.0 / a))
    else
        printl("x1 = (" + (-b / 2.0 / a) + "," + ((-d)**0.5 / 2.0 / a) + ")")
        printl("x2 = (" + (-b / 2.0 / a) + "," + (- ((-d)**0.5 / 2.0 / a)) + ")")
    end
end