What numbers belongs at the top? Really confused on how to solve this one

What is it? Like what type of math?

Step-by-step explanation:

I'm confused cause it can't be geometry cause a square would not have squares within  it that are different area units

For this case we have the following function:

To write in standard form, we follow the following steps:

Step 1:

We solve the binomial squared:

Step 2:

We combine similar terms:

the function, , in standard form is: