2.4.1.10Lab.py

'''
Estimated time
10-15 minutes

Level of difficulty
Easy

Objectives
becoming familiar with the concept of numbers, operators, and arithmetic operations in Python;
performing basic calculations.
Scenario
Take a look at the code in the editor: it reads a float value, puts it into a variable named x, and prints the value of a variable named y. Your task is to complete the code in order to evaluate the following expression:

3x3 - 2x2 + 3x - 1

The result should be assigned to y.

Remember that classical algebraic notation likes to omit the multiplication operator -
you need to use it explicitly. Note how we change data type to make sure that x is of type float.

Keep your code clean and readable, and test it using the data we've provided, each time 
assigning it to the x variable (by hardcoding it). Don't be discouraged by any initial failures.
Be persistent and inquisitive.


Test Data
Sample input

x = 0
x = 1
x = -1

Expected Output

y = -1.0
y = 3.0
y = -9.0
'''

# solution 

x =  input("Enter num: ")
x = float(x)
# write your code here
y = 3 * x ** 3 - 2 * x ** 2 +3 * x - 1 
print("y =", y)