<span>7 × (–3) × (–2)^2
= </span>-21 × 4
= - 84
Hope it helps
4^4square root 2 is the answer
It is just the difference between the signs
closed dot is if the number is part of the solution so if it is equal to
and
use open if it is not part of solution as in if it is greater than or less than
so for your picture x greater or equal to -2 it would be a closed dot
