Question

How do you simplify `3x^2y + 4 - 3x^2y`?

Answer 1

The answer is simply 4.

Explanation:

The subtraction property of 0 explains this one; it says that `a - a = 0`.

In this case, we have:

`3x^2y + 4 - 3x^2y`

The `3x^2y` and `-3x^2y` cancel out, leaving you with 4.