from tkinter import *
from tkinter import messagebox


def display():
    D = b.get()**2  - 4 * a.get() * c.get()
    x1 = (-b.get() + D ** 0.5) / 2*a.get()
    x2 = (-b.get() - D ** 0.5) / 2*a.get()
    messagebox.showinfo("Квадратные уравнения",'D=' + str(D) + '  ' + 'x1 =' + str(x1) + '  ' + 'x2=' + str(x2))

root = Tk()
root.title("Квадратные Уравнения")

a = IntVar()
b = IntVar()
c = IntVar()

a_label = Label(text="Введите a:")
b_label = Label(text="Введите b:")
c_label = Label(text="Введите c:")

a_label.grid(row=0, column=0, sticky="w")
b_label.grid(row=1, column=0, sticky="w")
c_label.grid(row=2, column=0, sticky="w")

a_entry = Entry(textvariable=a)
b_entry = Entry(textvariable=b)
c_entry = Entry(textvariable=c)

a_entry.grid(row=0,column=1, padx=5, pady=5)
b_entry.grid(row=1,column=1, padx=5, pady=5)
c_entry.grid(row=2,column=1, padx=5, pady=5)


message_button = Button(text="Click Me", command=display)
message_button.grid(row=2,column=1, padx=5, pady=5, sticky="e")

root.mainloop()