Do not under stand got confused and need

For #3, you just have to plug in the numbers for x.
It tells you what to substitute for x in the question. (x = 0, 1, 2, 3, 4, 5, and 6)

For example, let's substitute 0 for x.
6x - x² (the 2 means square the number, or multiply it by itself)
6(0) - (0)²
0 - 0
= 0.

You'll do that to all the numbers (1-6) and fill out the table.

For #4, you have to solve using the distributive property to find out if the equations on both sides are equal.

I'll do the first one for you.

6a - 8 = 2 (3a - 5)
6a - 8 = 6a - 10
They're not equal.