4. y = 3x2 - 12x + 10

4

Step-by-step explanation:

Take 2, and add it to 2

2+2

by adding, you should get 4.

2+2=4.

By doing this you combined the values of 2, and 2, to get 4.

You can also subtract -2 from 2 to also get 4. This works because by taking away a negative value from a positive number, your actually just adding.

Hope this helps!